Last updated: 13 November 2026
TurboScaler is a free piano practice app (scales and arpeggios) by Oscar Hattink, a Hattink-Franchi Family Production.
TurboScaler has no accounts, no adverts and no tracking, and we never sell or share personal data. The only information the app sends off your device is anonymous crash and performance reports (for example "the app closed unexpectedly on this screen", the phone model, the iOS version, the app version and how long screens took to load). These are sent to our error-reporting service, Sentry, so we can find and fix problems. They contain no name, email address, IP address, microphone audio or practice content, and are not linked to you.
If you do not connect a MIDI keyboard, the app uses the microphone to hear which notes you play. The sound is analysed on your device as it happens. It is never recorded, saved or sent anywhere.
Your set-up choices, practice streak and nuggets are stored only on your own device. Deleting the app deletes them.
If you switch on practice reminders, the app schedules notifications on your device. They are not sent from a server.
The app collects no personal information from anyone, including children.
Questions: hi@turboscaler.com