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CanOpener — for Headphones

By Good Hertz

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Get the most from your music

“CanOpener conjures speakers from your headphones” – Pitchfork
“CanOpener's approach is anything but snake oil — it's science” – Gizmodo
“CanOpener is an excellent app for listening with headphones on iOS” – TUAW

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

Need help? Find us on twitter @canopener or at

▶ Crossfeed – 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.

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

▶ Dosimeter and loudness metering – CanOpener can measure precisely how loud you are listening, helping you monitor your listening habits and protect your hearing.

• Play your existing iTunes library with CanOpener, no importing
• Support for lossless audio formats like FLAC and ALAC
• Play hi-res audio up to 192kHz/24
• Proven crossfeed algorithm and extensive monitoring controls
• Mastering-grade baxandall equalizer with spectrogram
• dB SPL prediction & dosimeter
• More precise volume control
• Gapless playback
• 64-bit digital audio path
• Good Hertz sample rate converter & dither

Add-ons (available for In-App purchase):
• Pencil EQ™ – A new equalizer option that allows you to create any EQ shape by simply drawing.
• Speaker+™ – Better sound for your iPhone's built-in speaker
• HiFi Pack – Unlocks even higher quality sample rate conversion and dither controls for pro users

* We recommend using CanOpener with iPhone 4S, iPad 2 or newer devices.
* CanOpener can play iTunes Match files, but the files must be downloaded to your device.

What's New in Version 1.22

• Improved dither reliability for all users
• Fix for FLAC library issues on iOS 6.0
• Improved library reloading for users with very large music collections

One last thing: if you enjoy listening to music with CanOpener, please take a moment to write us a nice review on the AppStore — a good review always helps!


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Customer Reviews

By far the best application I've bought.

Being a music lover and possessing pretty decent headphones (Beyerdynamic DT 880's), I saw all the good reviews of this app and though I'd check it out, though I was a bit skeptical. Now that I've spent some time with it, I'm truly amazed! I run the speaker angle maxed with the amount set to 75%, so it's subtle yet makes a huge difference in the listening experience. It sounds as though the gap between the left and right drivers is filled, providing better spacing and better (not "more") bass. I don't mess with the EQ that much since my headphones are already pretty flat, but it seems very decent. The UI is simple and well-animated. It's nearly perfect. My only request is for an option to have a tradition left-to-right scrubbing bar, as the circular one does get on my nerves at times.

This is a must-have for audiophiles, period. You won't be disappointed in your purchase.

A Music App for Music Lovers

Update: thanks for the non-intrusive "Rate me" nudge.

Original Review:
There is a renaissance of apps coming out that serve the needs of users that the digital, streaming age has forgotten about. Namely, this renaissance has been in the creation of apps that focus on *one* type of media, and do it well.

I choose CanOpener as my main media player. Yes, I am an Rdio subscriber. However, CanOpener has created a product that has made me want to plug in my old hard drive and unearth my vinyl FLAC rips of every version of every Beatles Album released. It made me want to keep things local, and it has made me love to love my music library again.

Streaming music serves as a great venue for those looking to discover new music. For those of us who understand their sonic tastes, and want to hear it at its best, CanOpener is currently unmatched.

There is one caveat to the app. Because we (users) need to use the app as the portal to their own music library, it would be nice for there to be a greater emphasis on helping them find their own music. I would love if the developers prominently featured a tab (icon) to access the music library, instead of having to close a bunch of panes to unearth the button that grants access to the music library.

Nice Interface

I've begun to use CanOpener for listening to music even when I am not using the equalizer or crossfeed just because I like the interface so much.

It would be nice if I could choose Airplay output from the same button where I can choose headphones. i would also like to be able to access Home Sharing, Apple’s radio and match without downloading tracks first, but I don’t think those are options that Apple will let the developer implement yet.

CanOpener — for Headphones
View In iTunes
This app is designed for both iPhone and iPad
  • $2.99
  • Category: Music
  • Updated: Mar 16, 2014
  • Version: 1.22
  • Size: 10.8 MB
  • Languages: English, Simplified Chinese
  • Seller: Good Hertz LLC

Compatibility: Requires iOS 6.0 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimized for iPhone 5.

Customer Ratings

Current Version:
All Versions:

Top In-App Purchases

  1. Hi-Fi Pack$4.99
  2. Speaker+$2.99
  3. Pencil EQ$3.99

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