This is almost the app I have been looking for. If you could change the angle from degrees, minutes, second to decimal I would change my review to 4 stars. You can add a results window that gives decimal but for some reason the developer did not put that as an option without the results window. I would change to 5 stars if you could make global default settings. It seems every time you take a new photo you have to change all the settings. The default yellow is hideous and because I need decimal and accurate placement I have to: 1. Take a new photo 2. Open setting 3. Change color for both curve and text 4. Change BG color so that I can see the text regardless of background color 5. Turn on loupe 6. Turn on results window 7. Choose deg 8. Save settings as default. This will only work while the app is open. As soon as I close it and reopen the setting go back to default.Changed to 4 stars because if you purchase you can save your settings. Will change to 5 stars if the developer will add the ability to set degrees decimal without needing to add the results window.

Being about to set multiple angles is great. Being able to move the angles to fit the picture is great. It's simple and it works. I have a few suggestions to improve accuracy. Have an option to offset the pointer above where the finger press is on the screen. It's hard to line up a point with some precision when the view is blocked by my finger. The see-through angle points do help though. Have a level indicator for how the device is tilted. If I'm trying to measure the angle of something on a flat and level table, then holding the phone level above the table is important for getting an accurate angle measurement. Then take the style and usefulness of this app and put it into another app for measuring distance. I can't find one that will let me take a picture of something with a distance reference in the shot (like a small ruler out even a quarter), then use that reference to calibrate the measurement scale so I can draw lines to measure one or multiple other things in the photo. PS: I know that the camera FOV distorts the image, but hopefully that can be compensated for.Update: The developer responded and said to use the "Loupe" feature in the settings. I didn't see or know what it was before, but it puts a small magnification window in the corner for precision placement of points and it works well and probably better than my previous suggestion! Thanks!

I tried 5 other protractor apps before this one. It’s like they’re all just copy and pasted. This one doesn’t charge just to use the basic functions of it. You can pay for ad free, but the ads aren’t giant pop ups every five seconds or anything, just slivers at the bottom of the screen. Very useful and would recommend over all the others.

This is the good app for measuring angle from photo. Multiple angles can be measured in one photo. The color of each angle can be changed. The initial and the end point can be defined freely. The photo with measured angles can be saved to the phone. This is almost perfect app. I already purchased and hope the developer will improve and add some useful features as the followings (it will be useful for general user and dental student/dentist/orthodontist)SuggestionsMain:1. Add note/name for each angle measurement2. Save default for last time setting (size of point, thickness)3. Measurement of two lines (two lines having intersection outside the screen cannot be measured by three-points angle)Optional-Linear measurement