App blog:
Millimeter Pro is a easy to use and helpful measurement tool for iPhone or iPad. It uses touch screen as a ruler or tape measure to make quick measurements, to split objects into equal parts, measure object ratio (W/H), measure area, estimate diameter and angles, split circular objects into equal parts. Place an object on the screen and simply touch and move rulers to measure it.
You can measure in different units: MILLIMETERS or INCHES.
- mm and inch units
- 2D measurements: vertical and horizontal rulers
- area calculation
- ratio calculation (W/H)
- split linear and circular objects into equal parts
- shows length and angle of each part
- disable/enable touch screen (freeze feature)
- diameter or radius estimation
- angle measure with Protractor / Goniometer mode
- Thread pitch gauge for TPI and pitch size measurements

Use this app in different areas to measure small objects that fit within your phone or tablet screen : jewelry, rings, stones, screws, bolts, buttons, nuts, knitting needles, knitting pattern, washers, insects, mosaic tile, hooks, frame wrap angle, etc. Enjoy the app and Thank you for your interest and support! VisTech.Projects Team

What’s New

Version 2.0.2

fixes and stability improvements

Ratings and Reviews

4.3 out of 5
56 Ratings

56 Ratings

notjustus_aw ,

Very handy for measuring small parts

I build bikes and deal with several hundred small parts, mostly in mm, this is great for a quick check on sizes and angles. I was just looking for graph paper and found this app which is much better.

One suggestion: could you reduce the precision to 0.1mm and .01 inches? The extra digits make it harder to read and if I need more accuracy, I'd need to use calipers anyway. Thanks.

raygood ,

Worst Ever Waste of Money

Horrible app. The title says it all. Avoid

Developer Response ,

Thank you for your feedback :).
UPD: still no details? What problem do you have with the app and how we can improve it?

You have an option to buy a ruler, caliper, protractor and TPI measure tool
and keep it in your pocket.
Or you can tell us more details how we can improve it to make it work for you.

SoapingFanatic ,

Thank You!

I have been waiting for years for an app developer to create a diameter ruler for ME. 😊 Thank you very much! I am an avid brooch collector and I get tired of having to estimate the size of a brooch using a linear or t-square ruler when a diameter ruler would oftentimes give me a better visual. If you wanted to make my year, make an option where I could stretch one side of my circle to create an oval/rectangular shape to better visualize the size of jewelry that has more oval/rectangular dimensions than circular. Great work! Thanks again!


VisTech.Projects LLC
8.5 MB

Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© VisTech.Projects LLC


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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