Synchrony™ Firefly listens to music using the built-in microphone. Powered by an advanced neural network that synchronizes oscillations to music, it finds the beat of any music in real time. Synchrony™ tells you the tempo as it listens. It's great for finding the tempo of live or recorded music, and for practicing keeping a steady beat. It can also flash the screen or the flashlight to the beat, like a firefly. Fun for concerts and for dance parties.

Ratings and Reviews

5.0 out of 5
6 Ratings
6 Ratings
cellopro ,

Very cool

Works well. Even more interesting is that it’s using algorithms designed to model beat perception in the human brain. Not just an onset detector. It’s actually listening to the music!

mstauff ,

Simple but fun

Am using with friends at small shows to surprise the band with jamming lights from the audience

jbye860 ,

Great app!

Simple and efficient. Works exactly how I needed it to.


Oscilloscape, LLC
15.1 MB
Requires iOS 9.2 or later. Compatible with iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPhone XS, iPhone XS Max, iPhone XR, iPad Air, iPad Air Wi-Fi + Cellular, iPad mini 2, iPad mini 2 Wi-Fi + Cellular, iPad Air 2, iPad Air 2 Wi-Fi + Cellular, iPad mini 3, iPad mini 3 Wi-Fi + Cellular, iPad mini 4, iPad mini 4 Wi-Fi + Cellular, 12.9-inch iPad Pro, 12.9-inch iPad Pro Wi-Fi + Cellular, 9.7-inch iPad Pro, 9.7-inch iPad Pro Wi-Fi + Cellular, iPad (5th generation), iPad Wi-Fi + Cellular (5th generation), 12.9-inch iPad Pro (2nd generation), 12.9-inch iPad Pro Wi‑Fi + Cellular (2nd generation), 10.5-inch iPad Pro, 10.5-inch iPad Pro Wi‑Fi + Cellular, iPad (6th generation), iPad Wi-Fi + Cellular (6th generation), iPad Pro (11-inch), iPad Pro (11-inch), iPad Pro (12.9-inch) (3rd generation), iPad Pro (12.9-inch) (3rd generation), and iPod touch (6th generation).
English, Korean, Spanish
Age Rating
Rated 4+
© 2017 Oscilloscape Inc.


  • Family Sharing

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

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