Highnote lets you adjust the tempo and key of the tracks in your music library as they are playing. It's an ideal practice tool for musicians and dancers. It’s also great for running or working out to your favourite songs at a speed that suits you.

And now, Highnote on Apple Watch makes it more convenient than ever to adjust the tempo and key of your music as it plays.

"While there are other apps on the iOS App Store that offer similar features, Open Planet Software's Highnote offers a simple, clear and beautiful-looking interface that allows you to focus on practicing, without any distractions." -

It's so simple to use:

Just pick a track from your music library using the built-in browser and Highnote starts playing immediately.

Need to slow it down or speed it up? Tap the tempo buttons to adjust the playback speed without altering the pitch. Perfect for nailing a difficult solo or mastering some tricky dance moves.

Want to sing or play along in a different key? Tap the key change buttons to transpose the track (up or down) so you can practice in a key that suits you.

* Realtime tempo control.
* Realtime key changes.
* Control the tempo and key from Apple Watch.
* Play any track from the music library on your iPhone, iPad or iPod touch.
* Play a track once or in a continuous loop.
* AirPlay support for output to wireless speakers or Apple TV.

What’s New

Version 2.3

Stability and performance improvements.

If you've got a moment to spare, we'd be delighted if you could leave a rating or review on the App Store. Your support is very much appreciated!

Ratings and Reviews

2.3 out of 5
19 Ratings
19 Ratings
pjdubbly ,

Almost. In need of an update though

It does a nice job of changing key and tempo but the loop button doesn't work. Also it only can access tunes that have been downloaded to your device. It will not see anything on iCloud.

There hasn't been an update in almost a year. Please fix the loop button.

Developer Response ,

You are correct that only tracks downloaded to your device can be played in the app - tracks in the cloud cannot be streamed while also changing the key and tempo. We’ll take a look into the issue with the loop button. Thanks!

almmilk ,


Great app, would love to be able to change tracks on my iwatch would. This would really make this app useful for teachers to stay engaged with their students!

Mojojuniorappratings ,

Doesn’t work very long.

We loved the app for about 3 weeks. It did struggle if I stopped a song midway and tried to restart again, but other than that it was really helpful. Now when I open it I either get a blank screen or none of my songs are linked so it won’t do anything. Very frustrating. Don’t buy this app. Would love to get my money back.


Open Planet Software Limited
992.3 KB
Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2017 Open Planet Software Ltd.


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