Apps in this category may contain mild or occasional cartoon, fantasy or real-life violence, as well as occasional or mild adult, sexually suggestive or horrifying content and may not be suitable for children under 9 years of age.

12+

Apps in this category may contain occasional mild indecent language, frequent or intense cartoon or real-life violence, minor or occasional adult or sexually suggestive material, and simulated gambling, and may be for children under 12 years of age.

17+

You must be at least 17 years old to access this App.

Apps in this category may contain frequent and intense offensive language; Frequent and intense cartoon, fantasy or realistic violence: frequent and intense adult, scary and sexually suggestive subjects: as well as sexual content, nudity, tobacco, alcohol and drugs, may not be suitable for children under 17 years of age.

Batphone Screenshots

iPhone

About Batphone

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 in the Latest Version 1.4

Last updated on Sep 8, 2017

Old Versions

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

Fixed iOS 10 compatibility issues.

Version History

1.4

Sep 8, 2017

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

Fixed iOS 10 compatibility issues.

1.3

Dec 3, 2014

iOS 7 and 8 compatibility

1.2

Jun 30, 2011

Relabelled the user interface.
Combined localization now works with the cellular radio when Wi-Fi is off.
Fixed several bugs.

1.1

Jan 27, 2011

Fixed bug which sometimes caused app to hang on initial "waiting for data" screen.

Improved the signal processing steps. Fingerprints are now smoother and more stable. Also, the frequency range was reduced, which improved the positioning results.

1.0

Nov 30, 2010

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