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 1.2.5

Improved accessibility for screen readers

Ratings and Reviews

4.5 out of 5
12 Ratings

12 Ratings

Person number1234675 ,

Practical and useful

I Play the cello and this app has helped me play through hours of scales. I would highly recommend either the online or app version!!

Olivelk ,


As a cello player, this is an excellent tool.
It also comes with a metronome which very handy.

PumpkinDog ,

Not much for a paid app

Just droning and metronome. Can only change the metronomes tempo to presets. Cant adjust the volume of the metronome/drone so they mesh together better. Cant adjust the drone sound to thin out the overtones. Very basic. Would expect more from a $1.99 app.

App Privacy

The developer, James Roberts, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

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

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