iPhone Screenshots


You can remove the vocal of a song, make a song faster or slower, and change the key of a song with this app!

The app is good for performers who cannot find the right music for their key, want a faster or slower version of the music, or cannot find the music of a song with no vocals.

And for others, it is just HILARIOUS to hear your favorite song in a different tempo or key!

Two simple steps in the app:
1. Select a song from your iTunes library
2. After the song is processed, you can then turn on and off vocals with the switch, change the speed and the pitch of the song with the sliders.

ZTX LE Time Stretch/Pitch Shift technology licensed from Zynaptiq GmbH, http://www.zynaptiq.com/ztx(c) Zynaptiq GmbH

What’s New

Version 1.6

Support for iOS 11
Faster file processing time

Ratings and Reviews

2.2 out of 5
29 Ratings

29 Ratings

Jraquet ,

Good Functionality(When it Works)

The app is decent, but crashes constantly, takes forever to load a song, and distorts the track heavily. Also the "Vocals" option doesn't just remove the vocals from the track, but removes all the high frequency range, so all you hear is the mid-range instruments like guitar. Being able to adjust the pitch by a half or whole step is a nice feature, though.

Tweensing ,

Does not work properly

The free version works for only 30 seconds of the song. While using the free app, I was offered the opportunity to upgrade. I pressed the button to upgrade, costing $2.99. I was never given the full version but charged $2.99. I went ahead and then I reopened the App Store and purchased the full version (versus upgrading within the free app), and “lo and behold” the app worked. I am unhappy because I was billed twice for this app and the first purchase never worked.

Moral of the story, if you are in s bind and need this type of app either purchase from someone else or purchase the full version at the start. Do not download the free app thinking you can upgrade within the app. The feature does not work.

MofoJoJo ,

Awesome with some work to do...

Yes, this app crashes… All the time as a matter of fact. But when it works, it rocks my freaking face off! Since I am a baritone, so many popular songs are out of my range. But with this app I can bring it down to my comfort zone and act like a rock star lol. And also being able to silence the vocal track of a song, it makes you feel like you are really singing with the band. I really hope that the developers work out the bugs, but I am really enjoying this when it works!


KBIC International Limited
1.2 MB

Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Japanese

Age Rating
Rated 4+
© 2012 KBIC International Limited


  • Family Sharing

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

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