Corner Trainer, privacy
Corner Trainer collects nothing. No account, no sign up, no analytics, and no network request of any kind.
Nothing leaves the phone
The interface, the combination catalog and the whole voice pack are inside the app when you install it, which is why a session runs with the phone in airplane mode in a basement gym. Nothing is sent anywhere because there is nowhere to send it, there is no server behind this app, no account to create and no third party SDK in the binary.
The App Store privacy answer for Corner Trainer is Data Not Collected, and it is checkable, there is no analytics library and no crash reporter shipped with it.
What the app stores, and where
Your settings and your session history, rounds, calls, and which combinations were called when, are written to the app's own storage on your device. They are readable by this app and by nothing else, and they are never uploaded.
Deleting the app deletes them. There is no copy anywhere else, so there is nothing to request, export or have erased on my side, and the CSV export on any session screen is there so you can take your own data out whenever you want.
What the app does not have
No camera. No microphone. No motion sensors. No location. No contacts. No advertising identifier. The app cannot see you train and never claims to, what it records is the calls it made, not what your body did with them.
Tracking
None. Corner Trainer does not track you across apps or websites.
Children
The app is rated 4+ and collects no data from anyone, of any age.
Changes
If any of this stops being true, this page changes before the app does.