Maestro Hero

Privacy policy

The short version: Maestro Hero collects nothing. It has no account, no analytics, no ads and no tracking. What you play stays on your iPad. The app goes online for one thing: Apple's App Store, for the one in-app purchase.

Last updated November 11, 2026.

No data is collected

There is no sign-in and nothing to sign up for. The app has no analytics or advertising code, and nothing about you or your practice is sent to us or to anyone else. We have no servers that could receive it.

The App Store, and nothing else

Maestro Hero is free with one optional purchase that unlocks more pieces. To show its price, to let you buy or restore it, and to check whether your Apple Account already owns it, the app asks Apple's App Store through Apple's own purchase system. Apple handles payment and your Apple Account; we never see your payment details, your name or your email. The app makes no other network connections.

What stays on your iPad

Your practice history: each loop you play and how each bar went, so the app can tell you what to practice next and chart your progress.
Your settings: the loop you were working on, tempo, hands, keyboard size and similar choices.
Whether you've bought the unlock, so the pieces open without a connection.
MIDI files you import: the song built from each file and the file itself. Imported songs are never part of the app and are never shared.

All of this lives in the app's own storage on your iPad. If your iPad backs up to iCloud or a computer, that backup is yours, under your Apple Account, and works the same way it does for any app. Deleting the app deletes everything it stored. Your purchase stays with your Apple Account, so you can restore it after reinstalling.

Microphone, camera, location, contacts

Maestro Hero doesn't use any of them. A USB MIDI keyboard you plug in is read only to grade and calibrate the notes you play; nothing it sends leaves the iPad.

Children

Because the app collects no information from anyone, it collects none from children either.

This website

This site has no cookies, no analytics and no third-party scripts or fonts. Like any web host, our host (Cloudflare) processes the network requests needed to deliver the pages.

Changes and contact

If this policy ever changes, the new version will be posted here with a new date. Questions: support@grainlabs.io.