Privacy Policy — Tonalys
Effective date: 2026-09-21 Last updated: 2026-09-21
Tonalys ("the app") is a tuner and metronome for musical instruments, published by Balin Corp (Belo Horizonte, Brazil).
This policy explains what the app does with your data. The short version: nothing leaves your device.
What we collect
Nothing. The app has no user accounts, no sign-up, no analytics, no advertising, no crash reporting and no third-party SDKs that collect data. It makes no network requests, so there is no server that could receive your data in the first place.
Microphone
The app asks for microphone access for one purpose: to hear the note you are playing so it can show you its pitch.
- Audio is analyzed on your device, in real time, while the tuner is on screen.
- Audio is never recorded, never written to storage, and never transmitted anywhere.
- Each block of audio is discarded as soon as it has been analyzed.
- You can refuse or revoke microphone access at any time in your device settings. The metronome and the rest of the app keep working without it.
Settings stored on your device
Your preferences — reference pitch (A4), in-tune tolerance, theme, selected instrument and tuning, last tempo — are saved locally on your device so the app remembers them between sessions. They stay on the device, are not readable by us, and are removed when you uninstall the app.
Sharing, retention and deletion
We do not collect any data, so there is nothing to share, sell, retain or delete. No data is sold or shared with third parties, and no data is used for advertising or tracking.
Purchases
Tonalys is a paid, one-time purchase sold through the Apple App Store and Google Play. Payment is handled entirely by Apple or Google under their own privacy policies. We receive no payment details and no personal information about you from your purchase.
Children
The app is not directed at children and does not knowingly collect data from anyone, of any age, because it does not collect data at all.
Your rights
Privacy laws such as the GDPR, the CCPA and Brazil's LGPD give you rights of access, correction and deletion over personal data held about you. We hold no personal data about you, so there is nothing to access, correct or delete. You are welcome to contact us to confirm this.
Changes to this policy
If this policy changes, the updated version will be posted at this same URL with a new "last updated" date. Material changes will also be noted in the app's release notes.
Contact
Questions about this policy or about the app: