Every measurement happens on this phone. Audio is analyzed as it arrives and is never recorded, never uploaded, and never leaves the device.
Nothing. There is no account, no sign-in, no analytics, no crash reporting and no advertising code. No third-party SDK is compiled into the apps, so there is nothing in them that could report to anyone even by accident.
We do not know how many people use these apps, which features they use, or when. That is the trade we made, and this page is the whole of it.
Measurements, sessions, calibration profiles and settings are written to the app's own storage on your phone. They are not uploaded. They are removed when you delete the app, and you can delete any session from inside it.
Audio is analyzed as it arrives and discarded. The apps do not record audio, and there is no buffer of it to recover.
These let the app keep working while the screen is off. They read nothing.
Exporting a CSV or sharing a card hands a file to your own phone's share sheet. Where it goes from there is between you and whatever you chose. Nothing leaves the app on its own.
The apps are free. One optional in-app purchase, $5.99 once with no subscription, adds depth. It is handled entirely by Apple or Google; we never see your payment details, and we are not told who bought it.
The apps collect nothing from anyone, of any age. There is no profile to build, so there is no difference in how a child's use is handled.
This page is generated from the pledge inside the app, which is versioned and dated. It is currently version 2, effective 2026-08-12. A promise cannot be changed without that version moving, and the change is recorded in the project's history.