Height Ruler is an app which uses your device's barometer to detect air pressure changes and calculates an object's height.

IMPORTANT! Please check if your device is supported before downloading.

With Height Ruler, you can easily measure anything. For example, to measure your height, just place your phone on the floor, then on your head and back to the floor and this app will do the rest. Then, you will get your height in meters or feet and inches! 

***Please note that you should disable silent mode and turn up the volume to be able to hear audible feedback of whether the measurement is complete.

***Do minimise movements when measuring as doing so would disturb the air pressure and thus yield inaccurate results.

*Developed by Wern Jie, 16.

• Works with just your device.
• Easy to follow instructions.
• Measures height to a maximum accuracy of ± 8cm (± 3 inches).

Supported devices:
• iPhone 6 or later, except iPhone SE
• iPad Air 2 and iPad Mini 4 or later
• All iPad Pro models

If you find any problems or want to ask questions, feel free to contact me via email at

What’s New

Version 1.0.2

- Fixed an issue where the app crashes on iOS 13. Sorry for any inconveniences caused.
- Fixed some unit conversion issues. Hopefully.

Ratings and Reviews

2.7 out of 5
7 Ratings

7 Ratings

mmmmmmrrrrriiiiuuuuuggg ,

Best app for measuring my height

Okay so at first it said I was 4 feet but then I did it again and it said I was 4 10 so could use some improvements but the app worked pretty good

xxxxaiyana ,

It’s don’t work

First the instructions are confusing. Second of it does work. Third of It was so not us full I could have just got a Measuring tape. Finally I don’t Recommend this. Thank you! Love-customer

Homerste78 ,

Horrible. Waste of money

Never has been accurate. It does not properly measure height. The only reason it got one star is because u have to mark one. Want money back.

Developer Response ,

Hi, Sorry for your experience with the app and this late response. This app measures with higher accuracy when your device is extremely stable and no hand shakes are included, such as while measuring the height of a table. There is also an accuracy gauge that states how accurate the measurement is just below the measurement displayed. The reason it only measures accurately while its stable and not shaking, is because by moving your phone, you influence the reading of the "barometer" sensor in your phone, which reduces the accuracy. Try measuring something static, don't move your device while measuring, and be amazed by the results :) Hope it works!

App Privacy

The developer, Eng Tat Lim, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer's privacy policy.

No Details Provided

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


Eng Tat Lim
14.5 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

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

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