ImproVox is the original vocal instrument for iPhone. Real-time pitch correction and harmonization enable you to create lush harmonies as you sing - and always sound in tune! Add vibrant textures with effects like reverb and echo, then record your performance and share it with friends.  

With state-of-the-art audio processing and a sophisticated yet intuitive feature set, it’s both easy to enjoy and a challenge to master. All it takes is the desire to explore -- and create.

Features Include:
-Real-time pitch correction
-Real-time harmonization
-effects including reverb, echo, ring modulator, flanger, and more!
-Recording and overdubbing
-Share via SoundCloud or email
-Import tracks from your iTunes Library
-AudioCopy and AudioPaste support
-Audiobus support

Headphones required

What’s New

Version 2.27.12798

Now running smoothly in iOS 8! We've also improved Audiobus connectivity and fixed a few other little bugs. Let us know how it's sounding over at

Happy Harmonizing!

Ratings and Reviews

3.3 out of 5
64 Ratings
64 Ratings
onion97 ,

So much fun, but doesn't work on iOS6

Title says all. THIS APP IS SUPER FUN! It sounds really nice, the features are awesome, and it's an overall good app. The reason I rated it 4/5 is because ever since a recent update, it no longer works on iOS6. When running an iOS6 device, it will close within seconds of opening the app. I can't even see the main screen because it will just be black for a moment and then crash. Great app, but a fix would be nice so that I can use it again
4/5 - 5/5 once it gets fixed

Emmeyeyes ,

Recordings are not real time

When you import tracks from your library to add the vocals to using this app, they come out horribly behind when you play it back. I am very disappointed that I can not use this app for anything now. You can hear the delay in monitoring on the headphones, but I had hoped like my other recording app, MTSR, this would only be a minor inconvenience happening in the monitoring, not a major one in the finished product. I was excited to get a recorder with vocal effects, but this is not it.

Glishba ,

Please update to 64-bit! This is too awesome too lose!

Improvox is too unique and too awesome an app to lose to iOS-11 updates that don't permit 32 bit apps to function. PLEASE have mercy on your fanbase and allow this great app to continue functioning. Many of us stay current on iOS updates, but iOS-11 is making me rethink that option.


MuseAmi Inc.
14.2 MB
Requires iOS 6.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2010


  • Family Sharing

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

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