Get the most from your music.

Download on the App Store

CanOpener makes listening to music better. Fine-tune the listening experience for your own ears, headphones, and personal tastes.

We’d all love to listen to music on great speakers. But — most of the time — modern life calls for headphones. CanOpener’s unique “Crossfeed” helps you recreate, on headphones, the rich sonic experience of listening on high-end speakers.

In this demo, Vulfpeck’s “The Birdwatcher.”

Dial in some more clarity, scoop the mids, boost or cut the bass. CanOpener offers flexible tone shaping with gorgeous, touchable equalizer options.

At right, The Olllam’s “Bridge of Glllass.”

iPhones are great, but their speakers are not. So we gathered all the iPhones from the 4 to the 5S, measured them in our studio, took that data, and improved the speaker quality.

Theo Katzman’s “Brooklyn,” as heard on an iPhone 5S speaker.

Available as an in-app purchase.

  • Listen to your existing iTunes library in CanOpener
  • Play hi-res audio (up to 192kHz/24) on your iPhone with the included Good Hertz sample rate converter & dither (more options available in the “HiFi Pack”)
  • Know how loud you’re listening with the built-in loudness meter and dosimeter
  • Support for lossless audio formats like FLAC and ALAC
The Good Hertz Sample Rate Converter
CanOpener’s Dosimeter
Support for FLAC & ALAC

CanOpener is made by Good Hertz, LLC. Find us on Twitter @CanOpener, read our blog, watch our videos, or email us at

© Good Hertz, LLC 2014