Terms & Conditions

Piano Tuner AI · Effective 25 September 2026

These terms govern your use of the Piano Tuner AI app and any purchase you make in it. By creating an account or making a purchase you agree to them. If you do not agree, do not use the app.

In short. The app needs an internet connection and a signed-in account to verify your access. Access is personal and works on up to three devices at a time. “Lifetime” means for as long as Piano Tuner AI is offered, not for your lifetime. If the service is ever shut down you will be told at least six months in advance, and lifetime owners keep offline use of the app. Purchases are billed and refunded through Google Play.

1. Who provides the app

Piano Tuner AI is developed and provided by its independent developer (“we”, “us”). You can reach us at support@pianotuner.pro.

2. Your account

You need to sign in to use Piano Tuner AI. Your piano profiles, measurements and pitch curves are stored under that account and synchronised through our cloud service. You are responsible for keeping access to your sign-in provider secure. You can delete your account and its data at any time as described on the data deletion page.

3. Internet connection

Piano Tuner AI verifies your sign-in and your Google Play access online. An internet connection is required to sign in, to buy or restore a purchase, to synchronise your data, and to start paid features. Without a connection, paid features may be unavailable until the app can verify your access again. The one exception is lifetime access, which the app can confirm from Google Play’s record on your device while you are offline (see section 5).

You are responsible for your own internet access and any data charges your carrier makes for it.

4. Purchases

All purchases are made and billed through Google Play. Google Play’s terms and refund policy apply to the payment itself, and refunds are requested through Google Play.
Subscriptions (monthly and yearly) renew automatically until you cancel them in Google Play under Payments and subscriptions. Cancelling stops the next renewal; access continues until the end of the period already paid for.
Free trials, where offered, convert into a paid subscription at the end of the trial unless you cancel before it ends. The trial length and price are shown by Google Play before you confirm.
Hourly access and day passes are one-off purchases of a fixed amount of access time and are used up as you use or wait out that time.
Deleting your account does not cancel a subscription or request a refund. Manage those in Google Play.

Nothing in these terms removes any right you have under the consumer law of the country you live in, including rights to a remedy for digital content that does not work as described.

4a. Your access is personal, on up to three devices

A purchase gives one person a personal, non-transferable licence to use the paid features. It is not for sharing an account between several people.

Paid access works on up to three devices at a time. A device takes a seat the first time it checks paid access; a fourth device is refused until a seat is freed.
You can free a seat in the app under Subscription & Access → Manage devices. Up to two devices can be removed in any 30-day period, so that seats cannot be rotated between people.
If you replace a device and have no removal left, contact us and we will free the seat.

5. Lifetime access

A lifetime purchase is a one-off payment that unlocks the paid features of Piano Tuner AI for as long as Piano Tuner AI is offered. “Lifetime” refers to the lifetime of the app and its service, not to the lifetime of the purchaser or of any particular device.

Lifetime access is tied to the Google account that bought it, and can be restored on another device signed in to the same Google Play account.
It ends if Google Play reports the purchase as refunded, charged back or revoked.
If our servers cannot be reached — because you are offline, or because the service is unavailable — the app accepts Google Play’s record of your lifetime purchase on a device where our servers last confirmed your lifetime access, so lifetime access keeps working without our servers.

6. Changes to the app, and discontinuation

We develop Piano Tuner AI actively and may add, change or remove features. We will not remove the core tuning features you paid for from a paid tier without a reasonable replacement or notice.

We may decide to discontinue Piano Tuner AI or its online service. If we do:

We will give at least six months’ notice in the app and on this page.
Before the online service is switched off, we will release a final version of the app in which lifetime owners keep offline use of the app’s tuning features on the devices where it is installed.
Cloud synchronisation, account sign-in on new devices, and features that depend on our servers will stop when the service is switched off. Export or keep any records you need before then.
Active subscriptions will not be renewed after the service ends. Any remaining paid period, and any refund for it, is handled through Google Play in line with its policy and the law that applies to you.

7. What the app is, and is not

Piano Tuner AI is a tool that helps a piano technician or owner tune an instrument. Its readings depend on the microphone, the room and the instrument, and they can be wrong. You decide what to do with a reading and you remain responsible for the instrument.

Tuning puts load on strings, pins and the soundboard. Pitch raises and the optional motor-assist hardware in particular can break strings or damage an instrument that is old, rusted or in poor condition. Use them with care, and at your own risk. If you are unsure, have a qualified technician do the work.

8. Liability

To the extent the law allows, the app is provided “as is”, and our total liability to you for any claim relating to Piano Tuner AI is limited to the amount you paid us for it in the twelve months before the claim. We are not liable for indirect or consequential loss, including damage to an instrument, lost earnings or lost data.

Nothing in these terms limits liability that cannot be limited by law, such as liability for death or personal injury caused by negligence, for fraud, or your statutory rights as a consumer.

9. Acceptable use

Do not share your account or purchase with other people, copy, resell or redistribute the app, circumvent its access checks or device limit, interfere with its service, or use it to break the law. We may suspend paid access on an account that does, after telling you why.

10. Changes to these terms

We may update these terms. The effective date at the top shows when they last changed. If a change materially affects paid access we will tell you in the app before it takes effect. Continuing to use the app after that means you accept the updated terms. A change never takes away access you have already paid for.

11. Governing law

These terms are governed by the law of the country where the developer is established. If you are a consumer, you also keep the protection of the mandatory rules of the country where you live, and you may bring a claim in the courts there.

12. Contact

Questions about these terms: support@pianotuner.pro.