Sonar Ruler

The Amazing New Sonar Ruler is an experimental app that uses echoes to measure distances with your iPhone!

* It uses the same principles that dolphins use to find food! *

It sends a short pulse from the speaker and measures how long that pulse takes to bounce off of something and return to the phone. It then estimates how far away you are.

>> Impress your friends with what this unique app can accomplish using only an iphone! <<

“that’s a damned neat trick for a phone to be able to do.”

Ϟ Currently the number one app in Denmark! Heck yes!

* Sonic distance measurement up to 60 feet
* Set Units to feet, inches, or meters
* Custom saved settings for measuring in different environments

If you’re a teacher, this app is a great way to teach students the principles of sonar, and how sound propagates through air.

** Watch a demo video here:

** German/Japanese subtitles here:


Follow us on twitter @laanlabs

*This is an experimental app, although it can be quite accurate, any measurements taken should be verified before using them.

17 Responses to Sonar Ruler

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  5. jose ramon del toro says:


    Sonar Ruler app is compatible con iphone 4?



  6. Glenn M says:

    will you have a version for droid any time soon?? If so, appr release time frame, and where. Thx.

  7. Marshall says:

    will it work with 4G iPod Touch?

  8. Brennar Lauterbach says:


    This app looks amazing! If you live in Canada however, you’ll never know just how amazing it really is! I bought this app a few weeks ago after seeing it featured on television, but it will not work because I live in Canada. Is this app a threat to Canada’s national security? What should I do? Wait for an update? Get a refund? Sit on the app until the AppleCare Warranty expires on my iPod Touch, then jailbreak it so I can use the Sonar Ruler?

  9. Jo says:

    nowhere there is a mention about its accuracy.
    Can you elaborate?

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  11. Adrian Demetrescu says:

    It doesn’t work on iPhone 4 or iPhone 5. Please update it.

  12. Oliveryck says:

    This app is a really great tool for sciences teachers to illustrate the use of sound to catch a distance using sonar rules.
    Unfortunately, since the release of iPhone 4, it’s no longer working properly…maybe some bug due to new component or a new IOS version trick.
    You would be so kind to a look at this! Even if you have to release a new paid version ;)

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  14. Keysborough says:

    In case can Custom saved settings also be use for measuring in different environments ????

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