Batphone 4+

Acoustic Indoor Localization

Stephen Tarzia

Designed for iPhone

    • 3.3 • 4 Ratings
    • Free

iPhone Screenshots


Batphone is a research tool which demonstrates a method determining your location within a building. It's meant to be an alternative to GPS or iBeacon, and it works by using the microphone to record room ambience. These acoustic room fingerprints are used to recognize previously-tagged rooms when they are revisited. For comparison, it also shows the position retrieved from Location Services, which determines your coordinates using radio signals from GPS satellites, wifi and cellular base stations. Our experiments have shown that Batphone's acoustic method is more accurate than the radio method. Try it for yourself and let us know what you think!

Fore more details, please see the report titled "Indoor Localization without Infrastructure using the Acoustic Background Spectrum" which was presented at the 2011 MobiSys conference.

What’s New

Version 1.4

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

Fixed iOS 10 compatibility issues.

Ratings and Reviews

3.3 out of 5
4 Ratings

4 Ratings

Bowa2 ,


I'm really confused? I've heard great things about it but what does it do? What is the actual function of it? Please advise.

The Blue Indian ,

Dude, this app is no bogus!

I tested it on my mom's bedroom, and then on mine: to me, both have almost exactly identical acoustics. However, Batphone was super-easily able to tell tge difference, even in complete silence! I infinitely highly recommend it!

goorioles747 ,

It works!

I was a little bit skeptical at first, but I tried it and it honestly worked... Really really impressive!

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.

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