Privacy Policy
Last updated: 4 November 2026 · App package: com.didapp.piano
What stays on your device
Your recordings, songs and projects, pads, custom sounds and presets, settings, lesson progress and scores are saved in the app's private storage on your phone and are never uploaded. Files you export (audio, MIDI, sheet music, backups) go only where you choose to save or share them. Uninstalling the app removes everything it stored.
Ads
Klavola is free and shows ads in two ways:
- Rewarded videos, only when you choose one: twenty instruments are always free, every instrument is open during your first week, and after that watching a short video opens any other instrument for 7 days.
- An occasional full-screen ad when you open a tool or start a lesson, never while you are recording or playing back.
The ads are served by Google AdMob (Google LLC). The AdMob software in the app may collect and send to Google: the device's advertising ID, the IP address (from which an approximate location can be worked out), information about the ads you see and tap, and technical diagnostics such as the device model and ad errors. Google uses this to show ads, to measure them and to prevent fraud. How Google uses this information is described at policies.google.com/technologies/partner-sites and in Google's Privacy Policy.
Your choices. If you are in the European Economic Area, the UK or Switzerland, the app asks for your consent through Google's consent form before personalised ads are shown, and you can change your choice at any time in Settings → Ad privacy choices. Anywhere, you can reset or delete your advertising ID in your phone's settings (Settings → Privacy → Ads on most phones); ads then are no longer personalised to it.
The app uses the internet only for ads and crash reports. Everything else, including playing, lessons and the studio, works offline.
Microphone
The microphone is used only for features you start yourself, and only while they run:
- Lessons with a real piano — the app listens to which notes you play to follow the lesson.
- Tuner — the app listens to show which note you play and how in tune it is. If you tap the tuner's capture button, a few seconds of that sound are saved in the app's own folder on your phone (removed when you uninstall the app) so you can listen back; they are never sent anywhere.
- Audio latency test (Settings → Audio diagnostics) — the app listens for its own click for a few seconds to measure the delay.
- Voice takes (Projects → a lane → Voice) — when you choose to sing or hum onto a track of your song, that recording is saved as a sound file in the app's own folder on your phone, as part of your song. It stays on your device: it is never uploaded or shared, it goes into a project backup only if you make one yourself, and it is deleted with its song or when you uninstall the app.
Apart from the voice takes and tuner captures you save yourself, the sound is analysed on your phone, in memory. Nothing the microphone hears is ever uploaded or shared. Android asks for the microphone permission the first time you use one of these features; the rest of the app works fully without it.
Bluetooth
The optional Connect a Bluetooth keyboard screen scans for Bluetooth MIDI instruments, only while that screen is open. It is not used to determine your location. The app works fully without it.
Crash reports
If the app crashes, a technical report is sent automatically to Firebase Crashlytics, a Google service, so that the developer can find and fix the problem. It holds the error and where in the app's code it happened, the app version, the phone model and Android version, the device's state at that moment (such as free memory) and a random installation ID. It does not hold your music, your recordings or your name. A copy is also saved on your device, and the next time you open the app it offers to copy it so you can send it to the developer if you wish.
Summary
| Data | Collected? | Shared? |
|---|---|---|
| Name, email, contacts, precise location | No | No |
| Microphone audio | No — processed on the device only | No |
| Your music, recordings and settings | No — stored on your device only | No |
| Advertising ID, IP address / approximate location, ad interactions, ad diagnostics | Yes, by Google's AdMob software, for ads | With Google |
| Crash reports (error, app version, phone model, Android version, device state, random installation ID) | Yes, by Google's Firebase Crashlytics, to fix bugs | With Google |
Children
Klavola is meant for people aged 13 and over and is not directed at children. It does not knowingly collect data from children.
Changes
If this policy changes, the new version will be published on this page with a new date.
Contact
Questions about this policy: didapphelp@gmail.com