We answer every email. Most issues are resolved in under a day.
Email hello@plutorock.com with:
Your Supertall Premium subscription is billed through your Apple ID, not by us. To cancel, upgrade, downgrade, or change billing:
If you cancel during the 3-day free trial, you will not be charged.
On a new device or after reinstalling, open the app and visit Account → Restore Purchases. Your premium entitlement will return if your Apple ID matches the original purchase.
Supertall is not a medical device. If an exercise hurts, stop. Sharp pain, nerve pain, dizziness, or symptoms that travel down a limb are signs to stop and consult a clinician.
You log a morning (AM) reading against a fixed wall. The app builds a baseline from three clean reads and shows you when a reading is trend-ready vs context-only. Diurnal compression is real — your evening height is often 1–2 cm shorter than your morning height — so AM is the trend signal.
No. Visible height comes from posture, decompression, and recovery; skeletal growth depends on age and genetics. Results vary. The app is honest about which reads are trend-ready and which are noise.
Yes. Anonymous device-anchored mode lets you use the app without signing in. Sign in later if you want cloud backup and cross-device sync.