Published by vistech.projects on Nov 4, 2023

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About Millimeter Pro - screen ruler

1. Use this screen ruler in different projects where you need to measure small objects that fit your screen: jewelry, rings 💍, screws and bolts, buttons and beads, nuts and washers, knitting pattern, insects, hooks, thread, etc.

2. The best and real full-screen ruler. ☛ ANY DEVICE can be calibrated for accurate measurements in Calibration Mode, where common standard objects (coins, credit cards, etc) can be used as a reference.

3. It uses the full screen of Android devices for distance and length measurements as a caliper or tape measure.

4. Place an object on the scale paper screen and simply touch and move rulers to measure it.

5. NO POP-UP ADS on your screen in the app unlike other free ruler apps on market.

6. Millimeter is a screen ruler app.

7. Pro version measures area, circle, radius and diameter, angle, ratio, and splits into equal parts.

8. Units: millimeter (mm), inch (in).

9. Check features for more details.

10. Fractions are supported for inch units. ☎ If you have any problems with the app on your device, please contact support@vistechprojects. com first and we will help you. Thank you. measurement range limited by the size of your screen and with fine calibration, the app gives you accuracy comparable to a standard ruler or measure tape.

Millimeter Pro Customer Insights

1. I need distances significantly over 10 cemtimeters.One feature I'd enjoy to have would be to save some of the measurements for quick excess when looking for the size/diameter of bit or bolt etc! At toolbox or store Smooth setup that can screenshot or hit lock simple to get hang of one would feel a lot more accurate getting a bolt a bit size.

2. After thinking about it, it might be handy to have a real world ruler as a secondary tool.

3. This app should be part of every phone's toolset and I sincerely hope the developers keep the excellence flowing.Honestly I bought it looking for a AR ruler.

4. :)Great for measuring small things, needs a compare feature, memorise size of objects for compare.

5. I didn't know a "real life ruler" became a ruler.

6. Option to change screen color for forground and background colours would be handy.

7. I thought it was a ruler replacement for real life.

8. It needs some modern refreshmentWanted an app to measure everyday objects like furniture or shelves when out and about.

9. Would like to have choice of black background and coloured forground.This app seems to be extremely accurate, but I do find it a little confusing to set up & use.

10. If you are a borrower then this the thing for you, but, if you are a tiny person relatively speaking carting around a mobile to measure your home its not at all practical.

11. For normal size people a bit of a waste of £1.39.Actually comes in handy at unexpected times.

Steps to Troubleshoot & Fix Millimeter Pro Issues

1. Fix Millimeter Pro Not Working/Crashes/Errors/Unresponsive & Black/White screen:


  1. Restart Millimeter Pro: Restarting the app will resolve most errors.
  2. Update the Millimeter Pro App. Here is how:
    1. On Android goto PlayStore » Search for "Millimeter Pro" » Open Millimeter Pro - screen ruler » click "Update".
    2. On iPhone, goto AppStore » Your profile » Available Updates » Check for Millimeter Pro » click "UPDATE".
  3. Clear Millimeter Pro - screen ruler app cache: Clearing cached data will force your app to retrieve the latest data directly from Millimeter Pro servers.
    1. On Android, goto Settings » Apps » Select "Millimeter Pro - screen ruler" » click Storage » click "Clear Cache".
  4. Check Millimeter Pro app permissions. If any of these permissions required to use your device's features are disenabled, Millimeter Pro might not work.
  5. Uninstall and reinstall Millimeter Pro. If nothing else has worked, completely uninstall Millimeter Pro then reinstall.
  6. Restart your device. Last, restarting your device can often clear most problems causing Millimeter Pro not working


2. Fix Millimeter Pro Server issues & Internet Connection


  1. Check network connection: An unstable Internet will make Millimeter Pro be unable to connect to it's servers. Ensure your wi-fi is working then restart app.
  2. Disable VPN: VPN can cause connection errors and lead to Millimeter Pro not working. Make sure all VPNs are off
  3. Enable background data: When Background data is turned off, Millimeter Pro may not be able to connect to the Internet when running in the background.

Reported Issues