ON Protractor

ON Protractor

50,000 - 100,000 downloads

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ON PROTRACTOR turn your smart phone into a useful protractor set for quick angle and slope measurement. It helps you measure the angle of everything conveniently and accurately with your phone anywhere, anytime.

It combines four most important angle measuring modes in one app, which is Touch Measure On Screen, Touch Measure with Camera, Plumb Measure On Screen and Plumb Measure With Camera. Each measuring mode operates differently to cater for your needs in measures the angle of different types of object from small object to huge object and even objects far away such as buildings.

ON Protractor is very easy to use, as described below. You can also switch the protractor measurement unit between degree and radian by just a click.
With ON Protractor, now you always bring an angle measuring pack with you as in your smart phone.

Measuring Mode 1: TOUCH MEASURE ON SCREEN
Place measured object on the screen and move the two line limiters to aligned with object's boundaries. This measuring mode normally used for small object in the range of screen size (Refer preview image 1)

Measuring Mode 2: TOUCH MEASURE WITH CAMERA
Aim the camera at the target object, at the same time move the two line limiters to aligned with the object's boundaries. This measuring mode normally used to measures large object. (Refer preview image 2)

Measuring Mode 3: PLUMB MEASURE ON SCREEN
Rotate the orientation of device in clockwise or counter-clockwise direction until the plumb line and protractor center line aligned with the boundaries edge of measured object. This measuring mode normally used to measures stationary and object larger than screen size. (Refer preview image 3)

Measuring Mode 4: PLUMB MEASURE WITH CAMERA
Aim the camera at the target object and rotate the orientation of device in clockwise or counter-clockwise direction until the plumb line and protractor center line aligned with the boundaries edge of target object. Press 'Lock' to fix the screen and take the measurement reading. This measuring mode normally used to measures the slope of huge object. (Refer preview image 4)

For more details information about how to use this measuring tool, please refer User Guide in this app.

KEY FEATURES:
★ 4 Angle Measuring Modes
★ 2 measurement unit: Degree and radian
★ Display device verticality/tilt angle in plumb mode
★ Lock/Unlock screen
★ Customizable theme, line color, text color and text size
★ Simple & smart user interface design, HD image
★ Keep screen awake

ON Protractor is a free protractor set with a lot of useful features lets you measure angle of anything easily and accurately in different situation. We hope this protractor set is useful to you in angle measurement. If you have any comments, suggestions or questions, please feel free to contact us at potatotree.soft@gmail.com. Thank you!!

Recently changed in this version

Update v2.0
- Add [Flash Light] function in camera mode
- Add sensor calibration function
- Minor bug fixes

Update v1.2
- Redesign menu screen for main menu button
- Bug fixed: User manual cannot be displayed
- Code optimization / File size reduced


Comments and ratings for ON Protractor
  • (66 stars)

    by mujahid afghan on 05/04/2014

    Mujahid

  • (66 stars)

    by Alejandro Reyes on 01/04/2014

    I hope this app helps me with my homework

  • (66 stars)

    by Douglas Williams on 29/03/2014

    Great tool

  • (66 stars)

    by Alberto Estrada on 28/03/2014

    Ok

  • (66 stars)

    by margareth mbea on 15/02/2014

    It so much

  • (66 stars)

    by Ashok Singh on 29/01/2014

    Nice

  • (66 stars)

    by Haoyang Wang on 27/01/2014

    I wish it can turn on the flashlight so that the phone will not cast shadow over the drawing I am measuring.