NEW AngleMaster PRO App from Bridge City

We made a quick video of the new app for the AngleMaster Prov2 which will soon be released for pre-order and we hope you can help us improve it before we commit.

Since we have been discussing this new tool over the past year, here are a list of improvements over the original, 2001 version of the AngleMaster Pro …

  • The AngleMaster Pro v2 does not need a set-up block to align the caliper to the AMP body.
  • one leg is magnetic–helps with stability on machine surfaces and allows conversion into a square/miter square with a pocket rule
  • one leg features a “V” groove for working with cylindrical references, i.e.; drill press table alignment, pipe rise/run, etc.
  • bosses on the back allow the tool to sit flat and function as a transfer bevel
  • all ball bearing pivots, tension is adjustable.
  • 100% anodized aluminum construction, no rust issues
  • common angles are laser etched on back of tool
  • dovetailed feet for future attachments
  • positive, factory set 90 degree stop
  • improved caliper jaw clamp

We are really pleased with this tool and believe you will be too–it now has officially earned our “Bridge City Essential”  classification.

A word about the video;  this was made for the sole purpose for your review and subsequent comments and suggestions–it is raw, and we will take it down when the official marketing video gets posted.

The app in the video was written for the iPhone, iTouch and the iPad. All other smartphones can access the exact same data set via web link.  We are not going to publish a manual but will, on request,  provide a PDF manual for those who want to print out 300 pages of numbers.

I look forward to making this app better with your help.

So–what do you think?


PS: Belated Happy New Year!

37 comments on this post:

  1. John,

    Will you be including an iTouch with my AMP-6iV2 purchase? Ha, just kidding, no reason to send your henchman (or Michael after me!)

    Great body of information; one thing that I would find very helpful is a picture or visual representation of how each angle corresponds to the tool set up. This would also be very useful to show how the miter gauge and blade would appear on a compound miter set up.

    Thanks, Rutager

  2. Rutager;

    We will show all of this in the main video–this is to figure out what we are missing or what to improve on the app first go around.

    Thanks for the feedback.


  3. John,

    I was refering to the app, so that with a quick look next to the writting on the screen, I can get a visual idea of what side of the tool my reading corresponds to. I’m thinking about the old cheat card that came with the first version, and having similar type pics to the left of the writting on the app screen. Trying to remember all the different ways of interpeting the data is bound to lead to ME making mistakes, maybe others too!

    Thanks, Rutager

  4. Okay, idea #2: Have a picture of the AMP on the screen, and when you tap say the caliper, you enter the reading and the app fills in all the angle boxes at the different locations around the tool and if you tap say the inclination angle area and enter the angle, it would show the setting of the caliper on the screen of the picture of the caliper, and of course fill in all the other angle boxes. Very cool! Yes?


  5. Rutager;

    When you see how we use this data, I think you will find the cheat sheets completely unnecessary. For example, with compound miters, if the only miter gage angle is obtuse, there is no other way to set it up–the miter gage is always obtuse on one side of the blade and acute on the other. Obtuse to the blade is obtuse to the blade. Same as blade tilt, we set it from the obtuse side, there is no other caliper setting given.

    We have never seen compound miters presented like this before, but it completely eliminates all the reference confusion. For example, on some table saws with the blade perpendicular to the table the indicator points to “0” degrees. Others indicate “90” degrees. We eliminate all that mess by giving you the only angle that you cannot confuse, a single, obtuse tilt angle.

    Same with miter gages. Some say “0” when they are set to cut perpendicular to the blade. Some say “90”. Now it does not matter because the only caliper setting this app will spit out is the obtuse angle. There is no way to confuse it with anything else.

    So we are hoping that one single obtuse angle for the miter gage, and one single obtuse angle for the blade makes sense. I don’t know if we can make it any less confusing.

    Hope this helps.



  6. What? Let’s hold off on this until you see our compound miter video. It is so easy a guy from Minnesota could do it….

  7. During a Minnesota summer possibly, but its been pretty cold lately; I think I have a region of permafrost in my brain!

    I will hold off on any more “brilliant” ideas until I’ve viewed the video!


  8. Agree with Rutager – at least add a reference screen in the app that labels everything and, maybe, has a how-to. Your technical terminology might not be understood at times.

    May I ask how one would use this tool to obtain an inside angle that is less than 90 degrees and the obtuse side is not accessible. Eg, moulding in a corner of a room where the walls come to 88 degrees due to some hack’s framing error.

  9. Other ideas for the app. Maybe consider using the feature on the iPhone and iPad that allows the user to visit a webpage and save it to “home screen”. This creates an icon that looks like an app, but behaves like a web shortcut. This means you don’t need to support/develop a separate app, and the mobile enabled webpage you do develop will work identically across all platforms.

    I just did this recently for a solar Kw generation app my provider created.

    Another idea:
    Add a feature to print.

  10. Very cool app, John. I’ve been stewing on this for a week or so, and I haven’t come up with anything that you’ve missed. I did think of something similar to Rutager’s idea of having a graphic of a triangle that would show the angle that’s being referred to in the calculation. But perhaps your help function covers that?

    I was also thinking of picking the AMP up and moving it around – I couldn’t see a means to lock the angle in. (Oh – duh – it just occurred to me that you can use the lock on the caliper to hold it in place. I was envisioning a knob at the vertex of the AMP, but I guess it’s not needed…)

    Very nice tool, and nice work on the app!

    – Peter

    P.S. Sounds like you had a cold – hope you get better. There’s a nasty one going around here, too.

    P.P.S. I loved your line “Most people have trouble with compound angles. Even I do sometimes…”

  11. John,

    Upon first reflection I am still shaking off the dust from the “wow explosion” in my brain after viewing your intro about the range of functions that the Angle-master could perform that will aid immensely in the pursuit of my craft and design – creating/strategy/planning.

    My Mitutoyo caliper that I just received from Enco is now awaiting patiently for it’s new mate!

    At this late hour I’m at a lost for an improvement for the app function,
    However as far as the “hardware” is concerned I do have one thought…..

    In the video clip (at 1:55 minutes into it) you talk about attaching a square to one end to measure outside angularity. I think I would love to see an accessory available to slide a specially fitted square over the leg of the Angle-master that you set the square against. I believe this would ease that hard function of the tool for that task, thus making the square “one” with the Anglemaster.


    ps. I couldn’t log on through my old username so I created a new one.

    hmmm, btw, Has the act of creating this app pushed you to the “far side of the Apple world”?
    I couldn’t miss the irony of a “dedicated PC user” giving a demo on an iPad with an Iphone in view as well.
    It had a deja vu feeling Steve Jobs unveiling a new product at a MacExpo.

  12. John,

    One other thought,
    Regarding Rutager’s and Peter’s thoughts above –

    this one,,,,,
    “I did think of something similar to Rutager’s idea of having a graphic of a triangle that would show the angle that’s being referred to in the calculation.”

    It would be really cool if on the app that “section of the angle” would be in three dimension and then be slowly rotating.


  13. @leftiistelf; I will figure out the acute side of the equation to counter the “framing hacks” of the world–this will require the acute angle transfer from a t-bevel to obtain an obtuse angle the caliper can read–not a problem. Regarding the ability to print; in the app, it takes one finger tap to send all the calculations to an email address. And, it should be really easy to create the weblink icon for quick home screen access. I don’t own one of the wireless web enabled printers, but this should work too if I understand them correctly. That said, if the info is on your phone maybe the printed version is not necessary. Also, FYI, the app keeps a history tree of your calculations–that is pretty cool.

    @Peter; The AMP locks rock solid using the gib lock on the caliper. Once all of the videos are done, you will be able to access a video from within the app that shows EXACTLY what to do with compound miters. We can’t add images to this app, but we can add stills to the web site version of the app.
    “Most people have trouble with compound angles. Even I do sometimes…” I say some of the most arrogant things. It never occurred to me how bad that sounded until Michael started lauging his butt off… I will learn…someday. Maybe I can blame it on the Legionnaires Disease I have…you know the version that would kill mere mortals but not me? 🙂 Oops, did it again…

    @Roger; In the original AngleMaster we did offer right angle legs that do what you suggested. We still can, but wanted to show how one can do this without buying accessories. If the demand is there, we will build them. The soles are dovetailed to accept sliding attachments down the road.

    Lastly, is there a Drivel Starved Nation member out there with an iPad (this photographs easier than the iPhone) that would like to test this tool and write a review? Roger and Rutager are out, we need a new letter of the alphabet…. actually, there is so much cynicism out there I don’t want those two being labeled BCTW “cronies”. This person should have: sound writing skills, be a regular forum participant of numerous woodworking forums, a digital camera and the understanding that not all woodworking is 90 degree corners. Drop me a line, We will send out a prototype unit and the code that can be downloaded into the iPad (the app is not up yet). The unit will need to be returned.

    Good suggestions so far–thanks!


  14. I have been following “John’s Blog” for about a year now. I am awed by the creative abilities at Bridge City Tools and the capacity to then turn those ideas into actual tools for the rest of us.

    I have several, the original HP-6, KM-1, DJ-1 and the PD-11. Which brings me to reason for my writing in.

    You guys are brilliant, but the rest of us perhaps less so. I was really excited to get the PD-11 divider and then really frustrated for a few days
    because I couldn’t figure out how to “work” it.

    I love (now) the simplicity of the KM-1, but it took awhile to understand how to use it. Thank God for the You Tube video. I had to watch the tool used several times with wood and saw before the light came on.

    These incredible tools are also often paradigm shifts in thinking about how to accomplish some tasks.

    While watching the Anglemaster Pro video, as I listened to Mike. I am having that “This one is really cool, but here we go again feeling”.

    “Also this side is magnetic, so we can use the tool as a square, just take your six inch pocket rule, put it up on the board. Now we can set any angle we want and draw our line, we have the ability to lay out lines to whatever we like.”

    I am thinking yeah right, I have my six inch rule, the board, now what? Will this be obtuse, acute, which app is that? Hmmm, what if I plug 15 degrees in this box, no that can’t be right.
    Ok, go read the little half page manual that came with it, like the KM-1. Nope, don’t see it yet, go back in house turn on the computer and watch the You Tube video about 10 times.

    Then he says, “Compound Miters are confusing to most people even to me sometimes and so we tried to simplify this. All you need are two pieces of information. Now this is for closed vessels. Number of sides, let’s just say we are going to do 8 and the angle of inclination. The angle of inclination is the deviation from horizontal.
    So this going to make a bowl shaped compound miter project and lets say it’s 45 degrees. There is my gauge acute angle setting at 35.85. It also tells me my blade tilt and the caliper setting for my blade tilt”.

    What? Oh now I am less confused. The angle of inclination is the deviation from horizontal, makes it perfectly clear. Working for an IT company, the added comment, “We have a complete Help section” does not make me feel all better now.

    Both Rutager and pfranks above talk about a picture or visual representation. They are so right, couch the help and usage discussion in some context.

    Obtuse is right. That’s me, and no lights will come on with obtuse, acute, or tilt angles.
    I don’t expect a lesson in geometry, trust me it didn’t take the first time.

    Nothing fancy, it doesn’t need to be. Mike said “It just doesn’t get any easier, it’s a really cool App.”

    Perhaps, but for simple souls, specific examples maybe like the following would be helpful.

    For a 15 degree angle line drawn on a board, do this:
    Open the app, goto section Angle whatever and enter 15 in this box.
    Then enter the mm value displayed in this other box on the screen into the caliper.
    Put the 6 inch rule on the magnetic leg and lay it against the board, you have exactly a 15 degree line.

    I appreciate this thing has 15,240 angle settings and is accurate to within 30 arc seconds.
    I get that, it’s REALLY Accurate, but please don’t forget to tell me how to use it in way that just us woodworkers can understand.
    (and get me on that pre-order list, please)

  15. John

    1. I agree with the previous posters, but I don’t think you are getting it? Either that or I have been in the sun too long.

    After watching the video it’s very clear what the obtuse angle is, what the angle of inclination is, what the tilt angle is and so on.

    The problem is one week later I won’t remember what’s what when I go to use the iPad app. A labeled screen shot diagram or even engraved icons on the back would help jog the brain cells. A quick tap on the “Elevation Angle” text that brought me to a picture that defined “Elevation angle” would be very helpful. My old steel trap ain’t what it used to be.

    2. Is this intended to directly set a table saw or radial arm saw blade tilt? If so it would be helpful if the edge against the blade is narrow enough to fit between two teeth so it’s flush to the blade body. Oh and make sure the base does not hit the nut holding the blade on (table saw only)

    3. I like how you measure outside angles by adding a square to the moving side. Would an extra set of magnets on that edge make that easier? Would it allow you to move the steel rule that you show to be used on both sides?

    4. It’s hard to tell from the video because the tail of the caliper is out of frame, but it looks like when the AMP is in the 90 degree (caliper closed) position that the tail of the caliper is touching the ground plane? I can’t explain why but it seems a good idea if there were some additional clearance there. Maybe I wouldn’t be smacking the caliper end every time I set it down, maybe it gives more flexibility for some other reason I can’t explain why, more of a gut feeling thing – it just seems less than ideal if in fact it does touch?

    5. I see how your have added bosses to the back which makes it nice to use flat on the drafting table. I can see how it would be more useful in the shop for layout and such if it were designed more like a speed square or tri square with one fat blade that you hang over the edge of a board and one thin blade that you use for marking. Much harder to do with the caliper thickness, but it would be useful in a different way. All design trade offs I guess. Any way to get both?

    The App looks great, very useful, fantastic idea, it should really make this tool sing.


  16. John,

    Ok, So I’m driving up to the coast to my studio and all I could think about are additional possible accessories for the “Anglemaster” !

    Allow me to introduce the “Slave Angles”,
    Let’s say you are creating a sculpture, or a piece of furniture that has a series of different angles that you need to explore in order to reach your desired goal. You need these “accurate” angle references all at the same time and they may change as you pursue your exploration.

    What if on the side of each leg of the Anglemaster you have two or three holes spread apart. (not on the side that you place down on the drawing with the standoffs) Into these two holes would fit a thin saddle square of sorts that would have two very short pins on each leg that insert into the above holes and would mimic the angle you are setting. Once you achieve your desired angle you then slip of the “slave” angle and set it off to the side as you then place the next one on to proceed with your next angle. The hinge mechanism would have to be a tad stiffer then the larger black aluminum saddle square I have of yours- in order to maintain the setting. I see these sold in sets of 3 in a three and six inch version. Straight off I’d order three sets of each. Thanx. : )

    Ok, now I could go to sleep.


  17. John,


    At the top end of each of the “slaves” (top of the V ) would be a treaded hole allowing you to screw in extensions of various lengths.

    Oh hell, forget about my order above I’ll order the complete set of Anglemaster Slaves and extensions.


  18. Great feedback folks! And now we need more…

    We think the AngleMaster Pro is a game changer for many, and a big part of changing the game is explaining how to do perfect work when using this tool. I completely agree with Marc’s comment about forgetting (I am embarrassed that I had to relive 10th grad trig to make this app work–talk about rusty…) So for intermittent users, we are counting on a two pronged approach: There will be a manual, just not with all the numbers, and we will shoot as many video tutorials as necessary so that you will never get lost in your own shop. I hope this puts some minds at rest.

    We have some limitations within the app (as of this writing) regarding imagery. This is solved via weblinks within the app itself. So here is our plan, and please comment–

    1. ALL of the calculation info, and associated videos will be available free on our site and open to everybody, and I may add, this info is incredibly useful for those that choose to pass on the AMP (we can’t imagine why of course…) The app itself is a whopping $5.95 and currently available for iPhone, iPad and iPod Touch only. Basically, we are writing a template over an existing third party, Apple approved engine–more on that later. Apps are expensive, and we know our limits (100K to get this on a Blackberry for example)–this is a really elegant, simple and functional option. I am personally excited about how fast this will allow me to do my own projects and I really like the way that I no longer have to sit and ponder if my cuts will be backwards, upside down, or whatever.

    2. Next week we are shooting the promo video–this product needs to launch before I can emotionally detach myself for my annual work retreat–which is a week away! This video should answer many questions, and address the 3 or 4 new sections I am adding to the app today due to yet another sleepless night. Of all the new products we have created, this may be the most significant in terms of the scope of capabilities and the video needs to do a great job. With our business model (zero financial risk), there is no guarantee we will make these again–although I am fairly certain it will catch on in a big way–you just have to use it once to “get” how comforting it is to know that accuracy is not a problem.

    3. Next week we are sending out prototype units to a couple of new Drivel Starved Nation reviewers in addition to Chris Schwarz at Popular Woodworking. These folks can write/blog whatever they want about this thing, and yes, they ALL will be returned, or better be I should say…

    4. @Mark: You have a good eye. The end of the caliper does not touch the ground plane at 90 degrees (there is about 0.010″ clearance). The prototypes we had built were scaled around my personal Mitutoyo caliper which is 4 or 5 years old (I love this thing). Their new calipers are longer and hence your “too close for comfort” observation. This has been rectified.

    5. @Mark and everybody else: Right now, it is on the drawing board to put a “V” groove in one leg and I want this feature. BUT… we could make both legs magnetic and then provide “shoes” that attach to either leg, i.e.: a “V” groove shoe, a “hook” shoe (for your speed square comparison), a thin “beam” shoe (think really thin blade) for static setups (blade tilt for example) and of course offset square shoes (these would also need clamps) for other angularity needs. This solution does address your desire “for it all” but adds cost. I am open to reviewing this so now is the time to chime in!

    6. Do you want us to add an optional, and removable, bubble level that will attach to one leg? It will cost around $15-20 bucks–this is actually kinda cool, you can identify angles in space in addition to identifying slope. (I am going to identify the slope of “heart attack hill” just off my driveway so you all will feel sorry for me. It does a good job of keeping me off my bicycle)…. Chime in please.

    7. @Roger: Can you send me a doodle? When I have to figure out what is in your brain I get headaches.

    8. Maybe the Festoolians have some suggestions too? We would love to hear them.

    9. When Michael gets done having babies, and back from yet another vacation, he will create an AngleMaster Pro forum in our community center.

    So, in short, we will have lots of imagery. Videos too. The app is getting way better today. (Here’s a teaser, imagine a perfect 90 degree miter joint where one leg is 3″ wide and the other is 2″ wide–quick, do the math. Now you know why you never see this joint, but do doodle it out–cool looking yes/no?).

    Third party opinions will be coming soon. Should I start looking for my own island again–the Kerfmaker was such a huge letdown…?



  19. John,

    I’ve never made an app, and sometimes am amazed that I got my shoes tied, but I’m still hoping that we could have a pretty picture with the angles and caliper readings in their relative places. You know about the saying “A picture is worth a thousand words.” In one of the posts you said something about still photos, so, could you have the app screen a photo of the tool on a flat surface with all the inputs and readouts in their general location; say with the tool set at a 45 degree inclination and pop up boxes at each location that “tap” to take input, and then the answers showing in the other spots? Then down below this area have “buttons to access the other features like compound angles, etc?

    Great minds think alike? I was also thinking of setting my AMP on a level to get readings on all the hills I ride up in Stillwater MN, so yes I would be thrilled with a level attachment.

    I’m also voting “yes” on the different soles you listed; I can see a use for all of them, but would probably get the most use from the speed square and the thin attachment, but would order all of them! It might be possible to incorporated more than one function in each sole; I’m thinking that the sppeed square sole could also have the thin blade feature on it as they might not both be used at the same time and could cut down on the cash outlay.

    Thanks for listening, Rutager

  20. Rutager;

    “In one of the posts you said something about still photos, so, could you have the app screen a photo of the tool on a flat surface with all the inputs and readouts in their general location; say with the tool set at a 45 degree inclination and pop up boxes at each location that “tap” to take input, and then the answers showing in the other spots? “

    Regardless of the merits of your suggestion (all good), the quick answer is no*. Being my jovial self, the quick analogy is to ask your pocket calculator to display a picture of an abacus and then after you do your calculations, the output number would display an image of the exact same number on an abacus. We are building this on a math engine, not a graphic engine, and the cost difference is prohibitive, actually for our size, impossible as of this writing. *We will link to images that should do the exact same thing, just not with your numbers. In practice, using the AMP to set angles is WAY easier than transferring from a traditional 180 degree protractor and WAY more accurate. In our book this adds up to WAY more fun! One other consideration, with the exception of the iPad, viewing technical images on a phone screen is a push–particularly with over 40 eyes, something you still have yet to encounter…

    Thanks for the suggestions on the soles. The more I think about it the more I like it, but we’ll see what others have to say.


  21. If you put magnets on both sides of the AMP, you’ll need to think about the torque they’ll put on the AMP’s joints and the caliper if it is locked.

  22. Charles,

    I agree. I am making design changes today that will facilitate yet to be named shoes that will attach without magnets.

    Thanks for chiming in.


  23. John,
    the video is great, the tool is brilliant. Here’s a crazy idea for you-as I’m sure you know, some of these calipers have SPC data output. If there is some enterprising 12 year-old out there to help us, the data could be sent automatically to a tethered ipod or wirelessly via a serial to bluetooth bridge connector. The electronics are relatively inexpensive. This wouldn’t really be necessary unless you had a ton of measurements and wanted to speed things up, but would be really cool nonetheless.

    Also, a center-finding function would be pretty handy. You could place the round stock under the tool, measure the angle an then calculate where the center is. Of course, you would need to fix the tool to a board with a little fence for the stock to keep things from moving. Simple enough, though.

    Just some thoughts. Can’t wait to buy one.

  24. There is an app called Carpenter which had a bubble level and shows degrees up to .1 degrees, depending on the accuracy of the gyroscope whatchamacallit in the iPhone. Something to consider as a compliment, but nothing as accurate as proposed.

    Regarding Festool:

    1) consider the height of the “feet” so that the AMP doesn’t slide under a short rail when used on the MFT with the miter gauge. The is the crosscut configuration of the MFT. The crosscut rail sits up relatively high ~.5″ to clear the miter gauge. Some of my thin squares slide under….

    2) Check out the Kapex angle guide. If the amp can’t be used directly, it could be used to set the angle guide that would in turn be used to set the Kapex. Don’t have it, but get access to one. Lots of precision users of it.

    3) There is a parallel routing jig guide (4 pieces of extruded aluminum) used to cut grooves, dadoes, and mortices. The AMP could be used with that. Same thing for positioning any of the rails on stock. Remember, the rubber edge of the rails is thin and could be incorrectly compressesed when using the AMP. Would be interesting if the AMP could ride in one of the grooved in the rails or the routing jig.

    4) Setting the blade angle on the TS 55/75 is a hassle. Most set it at 90 and forget it. Not sure if the base is made to be used for magnets.

    Non festool ideas:

    One of the feet accessories – allow it to be chucked into a drill press. Would allow the user to set angles – especially with all the new tables that have compound positions, or radial drill presses, especially if manually spun in the chuck.

    Sliding tablesaws and slider attachments – would be an awesome Felder accessory. Check their yahoo message board? Also check the shaper spindle tilt. That v groove would be great for that.

    Cove cuts on a tablesaw? Add the ability to do the math to app to allow users to figure out cove angles and set up jigs for it.

    Yawn. Time for a drink.

  25. John,

    Normally I would start worrying about annoying you by pushing my idea too much; but as I sit here waiting for the battery on my THIRD helicopter to charge, I don’t care as much! Darn you Economaki!!!!

    Back to my picture idea and your abacus analogy: in your example the picture would change with the answer, ie. the quanity of beads would move to one side or the other. My idea is to have the picture never change, just be like background wall paper, but have the numbers be entered or read out in the general area; so the beads wouldn’t move, the read out would just read the number of beads to each side at that side. Or in the AMPs case a window at each location of angles and at the caliper. My ramblings are a perfect example of how much easier it would be to understand if I had a picture of what I was trying to say!

    Thanks, Rutager

  26. I know the battery drill–well!

    This app does not do graphics in any way shape or form–it is on top of a number cruncher. We are planning on adding static imagery via weblink to all the sections. You will be fine. Let’s table this until you see the video where we are actually cutting wood. It is way easier than you think. By the way, the videos for each section will be available via weblink within the app too.


  27. Okay John, I’ll stop beating that horse!

    My concern is that when I’ve not used the tool in a while, I’ll need to do a refresher on what each angle is. So my next idea would be to have a picture or quick description on the tool itself for what reading angularity, inclination and tilt angle are. Maybe a short description could be added to each of the sections on the app too. Or even better; maybe you could sketch one of your self portraits holding the tool and explaining what each angle was, and then we could print it out and frame and hang it on our shop walls!

    I think someone mentioned this already, but maybe one of the soles or leg could have a post on the end to chuck in the driil press ala, MP-8? Of course with the DJ-1, my press is getting moved closer to the “door” every day!


  28. I love the ideas and the app. I’d like the graphics, too, but completely understand the limitations you’re dealing with using a math engine.

    I was thinking the special legs could attach to the AMP via dovetail locks like the HP6v2.

    I’d love the level for free-space measurements. I have a table I’ve designed and actually bought the plumb bob since much of the joinery would best be laid out with some free-space measurements. Well, so I think. The AMP with a level would make some aspects of that much easier and precise vs using a bevel gauge.

    Yes, too, to all the leg attachments. I’m a legs guy.

  29. For those without access to an iphone or internet access what are the options for finding the angle? I would assume it would be something that could be figured out with a standard scientific calculator or perhaps a Construction Master? It seems as though the two legs of the triangle are a constant with a changing hypotenuse but since it’s not a right triangle, the formula that’s needed escapes me. Thanks

  30. J.C.

    I suspect those without an iPhone or internet access have no idea this tool exits. That said, finding the angle is straight forward, use the law of cosines. The math is as old as Pythagoras, we just made it really easy using today’s technology.


  31. I guess at this point I would be in the minority but internet access at the shop is somewhat inconvenient and if for some reason it’s at a job site, the internet would be non existent. My cell phone is so no thrills, it’s not even a camera. I’m sure sometime in the future that will change but as for now, a calculator is always within easy reach.

    I dug out my trig book and found the laws of cosines. First few times will be a little work but shouldn’t be too bad. Sounds like I’ll have a few months to practice before I get my new toy. Looking forward to the videos. Thanks

  32. J.C.,
    Don’t you think it is cool that 1) you knew it was trig, 2) that you had a book on trig,3) and that you are revisiting your past where you likely were given no real world applications for what you were supposed to be learning? I think this is fun because knowledge trumps ignorance every time.


  33. For whatever reason, when I was first thinking about it, I thought trig was just for right triangles. I guess it was because that is the only thing I’ve ever used it for since after high school. When you mentioned “cosines” I knew it had to be trig.
    I browsed through my book and it is a very interesting subject. I’m sure I would be a much more involved student now than I was back when I first took the class. It would have been nice if they would have given practical applications for what we were learning at the time.

  34. John,
    Will the app work with the original Angle Master? I have one (#815), I have the calculator that you recemended when I got it but this app would be much easier to use. Let me know please if it will work and when the app will be available.

  35. Rusty;

    Yup. Out of town at the moment, but drop me a line ( and I will send you the info. The app is ready.
    HP discontinued that calculator the week after we launched the original AMP. FYI.

    The same info will be up on our website in Feb.



Leave a Reply

Your email address will not be published. Required fields are marked *