Terms

Last updated October 16, 2026. These terms cover the LessonKeys app for iPhone and this website, made by Mousa Technologies Inc. By using them, you agree to these terms. Plain version: use LessonKeys for your own practice, be kind, and don't copy it.

Using LessonKeys

LessonKeys is for your own personal practice. You can use it without an account. If you create one, keep your sign-in details to yourself, and tell us if you think someone else has them.

Your music

The pages you scan or import stay yours. We don't claim any rights to them. You're responsible for having the right to practise the music you scan, and please don't use LessonKeys to share or sell other people's sheet music.

LessonKeys Pro and ads

Every lesson is free. The free plan may show ads between lessons. LessonKeys Pro is an optional subscription that removes them. Apple handles the payment through your Apple ID. The yearly plan starts with a one-week free trial, and you can cancel any time in Settings, then your Apple ID, then Subscriptions. Refunds are handled by Apple.

What not to do

• Don't copy, resell or reverse engineer the app.
• Don't overload or misuse our page reading service.
• Don't use LessonKeys to break the law or someone else's rights.

Changes to the app

We keep improving LessonKeys, so features will change. If a change matters, we'll tell you in the app.

No guarantees

LessonKeys helps you practise, but we can't promise how fast you'll learn. Scanning isn't perfect either, which is why you can tap anything that looks off. The app and website are provided as they are. To the extent the law allows, Mousa Technologies Inc. isn't liable for losses that come from using them.

Ending your use

You can stop any time, and delete your account in the app under Settings, then Delete account. We may close accounts that break these terms.

Questions

Email [email protected]. We'll answer within 30 days.