iPhone Screenshots


ClapIR is a tool for measuring the acoustic properties of a room. Simply start the app and clap your hands. ClapIR then analyzes the clap's recording to calculate the room's reverberation times and frequency response. It's acoustics engineering made easy!

ClapIR is based on research done at Northwestern University by Prem Seetharaman and Stephen Tarzia.

What’s New

Version 1.3

This app has been updated by Apple to display the Apple Watch app icon.

Fixed a bug causing the app to sometimes crash.

Ratings and Reviews

3.6 out of 5
10 Ratings

10 Ratings

Thelgord ,

Good app

Good app, but I wish there was a way to clear the display without multiple undoing. Other than that, it’s a great app that can help me find the best spot for audio recordings.

Astrubal ,

The tool I was looking for !

Thanks a lot for this simple but great tool. It does what it is supposed to do.

You saved my day, thanks again.

KynarroAetone ,

Really cool app!

I liked it! Works well... FIRST TO RATE!!

App Privacy

The developer, Stephen Tarzia, 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

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

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