Drone Tone Tool is an app created by professional musicians and music educators providing high quality reference pitches with the rich overtones of real cellos. We encourage musicians of all abilities to experience the benefits of reference tone practice!
Why real cello drones?

There are many electronic tone generators, and while they are better than nothing, they lack complexity of overtones and can be painful to listen to. Our cello drones are pleasing to the ear, rich in overtones and contain layered octaves to facilitate practice in all registers.

Purpose and benefit of reference/drone tones:

A reference (or drone) tone provides a center of harmonic stability. Our ears are able to discern the way that multiple pitches interact while strengthening our internal sense of pitch. By playing with a movable pitch (instrument or voice) relative to a fixed pitch (drone tone) we can start to perceive truly consonant perfect intervals, and 'shades' or 'colors' within Major/Minor intervals. This heightened awareness of relative pitch leads to artistry through intonation.

What's New

Version 1.2.4

App now produces sound even when the alarm mute switch is turned on.

Ratings and Reviews

Great tool!

Bassguitar 714

I've used the web version of DroneTone tool for years,but app is more convenient. Playing scales and arpeggios against a drone tone is the best way to train your ear and develop a sense of the tonal center. The app doesn't have lots of frills, but it's easy to use and the cello tones sound great.

Don't buy--no support


I purchased this app yesterday; it doesn't work, and there are no instructions at all. I have contacted support but haven't heard from them. I want my money back!

Great app!


Works well for double bass, too!


James Roberts
48.8 MB
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2016 James Roberts


  • Family Sharing

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

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