Privacy policy
Effective 10 November 2026
Tropus collects no data. There is no account, no analytics, no advertising and no third-party code in the app, and nothing you do in it leaves your device.
What stays on your device
Your settings and the last scale, instrument and tempo you used are saved on your device so the app opens where you left it. They are never sent anywhere, and deleting the app deletes them.
The microphone
The tuner is the only part of Tropus that uses the microphone. It listens only while the tuner is open and the app is on screen, and stops as soon as you close it or leave the app. The sound is analysed in memory to find its pitch. It is never recorded, stored or sent anywhere.
Purchases
The free trial and the one-time unlock are in-app purchases handled by Apple. Tropus talks to the App Store only to show the price, to buy and to restore a purchase. The app never sees your name, your email address or your payment details, and keeps no record of its own: it asks the App Store on your device what your Apple Account has bought. Apple's handling of your purchase is covered by Apple's privacy policy.
Tracking and children
Tropus doesn't track you, in the app or across other apps and websites. Because it collects nothing from anyone, it collects nothing from children.
If you write to us
If you email support, we receive your address and whatever you write, and use them only to answer you.
Changes
If this policy changes, the new version will be on this page with a new date.