Legal

Terms of use

In force Last updated — 7 September 2026

In short

Rehearsio is a practice tool. Use it however you like, on any device you own, for your own playing or your teaching. What you make in it is yours and stays on your device.

Two things are worth knowing before you rely on it. The sheet music you bring is your responsibility, not ours. And because your work lives on your device rather than on a server of ours, keeping a copy of it is your job — we cannot get it back for you.

Who we are, and what this is

Rehearsio is made by Mammad Mahmudzade in Germany — one person, not a company; the full postal address is in the Impressum. These terms are the agreement between you and him about using the app. By installing or using Rehearsio you accept them; if you do not, do not use it.

Using the app

You may install and use Rehearsio on devices you own or control, as much as you like, for practising, teaching, rehearsing or performing. Whether you do that as an amateur or for a living makes no difference to us.

The app is licensed to you, not sold. What we ask in return is short:

  • Do not take the app apart, decompile it or copy it to build a competing product, except where the law says you may regardless of what we write here.
  • Do not resell, rent or redistribute the app itself.
  • Do not use it to do something illegal.

Beyond that we have no interest in how you practise.

You can end this agreement at any moment by deleting the app; nothing has to be cancelled, because there is nothing to cancel. We may end it if you break the terms above, which in practice means we would stop supporting an installation being used to do something illegal.

The sheet music you bring

Rehearsio comes with no music of its own. Every score in your library is a file you brought to it.

You are responsible for having the right to use those files — whether they are out of copyright, bought, licensed to you, or written by you. We do not check, and we could not: your files never reach us.

The app can print your marks into a copy of a score and hand that copy to your device’s share sheet, the same way any PDF app on your phone can. If you send such a copy to somebody, that is your act and your responsibility, and the rights in the underlying music are unchanged by our having drawn on it.

A note for rights holders. Rehearsio hosts nothing. There is no library of ours, no server holding user files, no catalogue, no search, no way to publish a score to other users of the app, and no copy of any score outside the device its owner put it on.

That means there is nothing here for us to take down. If you believe someone is using the app to infringe your rights, the person and the channel they sent the file through are where that can be addressed. We will help where we sensibly can — write to rehearsio@gmail.com.

Your content, and your copies

What you make in Rehearsio — your marks, your notes, your recordings, your practice history — belongs to you. We claim no rights in any of it, and we hold no copy of it.

The consequence is the important part: we cannot restore your work. If your device is lost, broken, wiped or replaced and you have not saved a copy elsewhere, it is gone, and there is nothing we can do about it.

The app can write your whole library into a single file for you to keep somewhere safe. Doing so, and keeping that copy somewhere it will survive, is up to you. Rehearsio is a practice tool, not a backup service.

Purchases

There are none. Rehearsio is free, and there is nothing to buy inside it — no subscription, no unlockable features, no advertising.

If that ever changes, the terms covering it will be written here and shown to you before anything can be bought.

Availability and changes to the app

We will keep the app working and fix what we can. We do not promise that it will always be available, that it will run on every device or every version of an operating system, or that it will keep every feature it has today.

Features can change, and occasionally one may be removed in an update. Where a change would affect work you have already done, we will say so in the app before it happens.

Warranty and liability

Rehearsio is provided as it is. To the fullest extent the law allows, we make no warranties about it — not that it will be uninterrupted or error-free, not that it will suit a particular purpose, and not that its tuner, metronome or timings will be accurate enough for any use where accuracy matters more than it does in a practice room.

To the fullest extent the law allows, we are not liable for lost or corrupted data, lost recordings, lost practice history, missed lessons or performances, or any indirect or consequential loss arising from using the app. In particular, and to say the thing most likely to actually happen: we are not liable for work you lose by not keeping a copy of it.

German law does not allow all of that to be excluded, and we do not try to. Liability remains in full for damage caused intentionally or by gross negligence, for injury to life, body or health, and wherever the Product Liability Act applies. Where an obligation is breached that is essential to the purpose of these terms — one you must be able to rely on for the app to be any use at all — liability for ordinary negligence is limited to the kind of damage typical for an agreement like this one and foreseeable when it was made.

None of this takes away rights you have as a consumer that cannot be signed away. If the law where you live gives you protections that conflict with anything in this section, those protections win.

If you got the app from the App Store

These terms are between you and us alone. Apple is not a party to them.

  • Apple has no obligation to provide any support or maintenance for Rehearsio.
  • If the app fails to conform to any warranty, you may tell Apple, and Apple will refund the purchase price if there was one. Beyond that, Apple has no warranty obligation at all in respect of the app.
  • Apple is not responsible for any claim about the app — product liability, a failure to meet a legal requirement, or a claim under consumer protection or privacy law.
  • If a third party claims the app infringes their intellectual property, we, not Apple, are responsible for dealing with it.
  • You confirm that you are not in a country subject to a United States embargo or designated as supporting terrorism, and that you are not on any United States list of prohibited or restricted parties.
  • Apple and its subsidiaries are third-party beneficiaries of these terms and may enforce them against you.

Governing law

These terms are governed by the law of Germany.

If you are a consumer, that does not deprive you of the protection of the mandatory law of the country you live in, nor of the right to bring a claim in the courts there. Rehearsio is not signed up to any alternative dispute resolution body, and is not obliged to be.

Changes to these terms

We may change these terms — most often because the app has gained something the terms do not yet cover. When we do, the date at the top of this page changes.

A change that meaningfully affects your rights will be shown to you in the app, not left here to be discovered. Continuing to use Rehearsio after such a change means you accept it; if you do not, you can stop using the app and delete it.

How to reach us

Write to rehearsio@gmail.com. A person reads it — there is only one.

By post: the address in the Impressum.