Fermata is a personal instrument for iPhone and iPad, provided as-is for your own use.
Fermata samples your device's motion sensor while you hold the phone for a minute you have marked, and draws how steady the device was as an abstract field of light that lives on your Home Screen, Lock Screen and StandBy. It observes device steadiness and elapsed time, nothing else. It shows no charts, trends or insight reports; it does not measure, interpret or diagnose any mental or physical state; and it is not a health, therapy or diagnostic tool. Do not use it as the basis for any medical or safety-critical decision.
Fermata Premium is offered as an auto-renewing monthly subscription ($4.99/month) or annual subscription ($39.99/year, with a 7-day free trial for new subscribers), and as a one-time Lifetime purchase ($89.99, family-shareable), all billed through your Apple ID. Subscriptions renew unless cancelled at least 24 hours before the current period ends; manage or cancel them in Settings → Apple ID → Subscriptions. The free tier remains fully functional regardless of any purchase, and the picture it draws is identical in quality to the paid one.
The readings you take and the pictures they produce are yours and stay on your device. Fermata claims no rights over them.