Millimeter - screen ruler

Millimeter - screen ruler


(4 stars)


Download for Android Like

100,000 - 500,000 downloads

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Millimeter ruler is a simple and helpful measurement on-screen tool that allows you to use your Android device screen for quick measurements as a ruler, caliper or tape measure.Place an object on the scale paper screen and simply touch and move rulers to measure it. Check features for more details.
CLEAN: NO PERMISSIONS and NO POP-UP ADS on screen in the app unlike other free ruler apps on market.

You can use any Android phone or tablet as a ruler for measurement in different units, MILLIMETERS (mm) or INCHES.


- easy calibration of any Android device (Free and Pro)
- metric and Imperial units : mm and inch (Free and Pro)
- 2D measurements: vertical and horizontal rulers (Pro)
- area calculation (Pro)
- split linear and circular objects into equal parts (Pro) ( thread pitch gauge for TPI measurements)
- shows length and angle of each part (Pro)
- disable/enable touch screen (Pro)
- ratio calculation (W/H)(Pro)
- circular objects diameter measure (Pro)
- shows length and angle of each part (Pro)
- disable/enable touch screen (Pro)
- Thread pitch gauge for TPI and pitch size measurements (Pro)

- fractions for inch units
- option to set exact size and number of parts directly (Pro)
- German, Russian, Japanese and French languages.

*Pro: check out our Pro version for extra features.

Use this screen ruler in different areas to measure small objects that fit into your phone or tablet screen : jewelry, rings, stones, screws, bolts, buttons diameter, nuts, knitting needles, knitting pattern, washers, insects, mosaic tile, hooks, thread, etc.

Please visit to learn more about the app and PRO version


measurement range limited by size of your screen, but with fine calibration the app gives you accuracy comparable to standard ruler or measure tape. For wider measurement range, check out our other measurement tools like Partometer, Partometer3D, Diskometer, Telemeter, Planimeter, etc.

Enjoy the app and Thank you for your interest and support!
VisTech.Projects Team

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Recently changed in this version

1.0.11 - small bug fix and menu button integrated
1.0.10 - stability improvement.
1.0.9 - save and keep app settings for the next launch
1.0.8 - fractions for inch units; German, Russian, Japanese, French languages support

Comments and ratings for Millimeter - screen ruler
  • (64 stars)

    by David Morrison on 03/12/2014

    Can't get it out of calibration mode.

  • (64 stars)

    by Sherwin Albert on 30/11/2014

    acurate "straight out of the box" Will be useful

  • (64 stars)

    by Rony Hasan on 25/11/2014


  • (64 stars)

    by Clem Tutt on 23/11/2014

    Millimeter Ruler

  • (64 stars)

    by Farhan Hussain on 15/11/2014


  • (64 stars)

    by Karen Baird on 10/11/2014

    The American mind has a hard time visualizing millimeters, and it is a real pleasure to be able to put something on a phone screen and measure it exactly. Thanks!

  • (64 stars)

    by Janus Sanidad on 05/11/2014

    What is the exact calibration of lenovo A680 w/ screen size of 854x480,,.. Thank you...this apps doing good on my lenovo. Just want to know the exact calibration thank you..

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