iPhone Screenshots


Practice reading a vernier caliper using this free and easy app.

Ever wanted to practice reading a vernier caliper but didn't have a set? No worries, now you can practice on your iPhone using this free and easy app. Just slide your finger across to grip the red object and take your reading. Enter your guess and press "Guess" to see if you got it right.

Keep practicing and you'll be able to read the vernier caliper like a pro!

What’s New

Version 1.4.0

This app has been updated by Apple to use the latest Apple signing certificate.

- Fixed minor layout issues

Ratings and Reviews

4.2 out of 5
6 Ratings

6 Ratings

Jyoan.N ,

Useful but still has room for improvement

I like the colours and simplicity (not trying to be more precise than O'level requires).

I wish it could measure all the way, beyond 10 cm.

hoooooooooray ,


This app is fun and entertaining. It is a fun game that helps with studies and enables you to practice using a vernier caliper without having one! The fact that this app is free and widely available is great and I think we can all use this to help us score better in examinations. In the real world, this could help us be able to measure the length of things with extreme precision. Overall just incredible design and a wonderful app.

mamakakaka ,

Great app!

Me and my friends frequently compare each other’s score on this app and even tried speed running it! Not only is it fun and entertaining, it never gets old and teaches us the ways of using the vernier callipers correctly without owing a pair! The competitive nature of this app combined with its excellent UI makes it a perfect app. 10/10 will recommend to my other friends.

App Privacy

The developer, Jiun Wei Chia, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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