Support
DropVolley is a one-person operation — emails reach a real human (the developer) and get a real reply, usually within 24–48 hours.
Email: info@kalibrefin.com
Common questions
What does Premium unlock?
The AI Coach — a tennis chat assistant that remembers your matches and training context. Everything else (daily decision quiz, the training plan, mobility flows, and the drill/match/mobility tracker) is free to use.
How do I manage or cancel my subscription?
Subscriptions are billed through your Apple ID. Manage or cancel anytime in iOS Settings → tap your name → Subscriptions → DropVolley. Cancelling keeps Premium active until the end of the current billing period.
How do I restore a purchase on a new device?
Open the paywall and tap “Restore Purchases.” As long as you’re signed in with the same Apple ID, your Premium access returns. No in-app account is required.
Can I delete my account and data?
Yes. Profile tab → Delete account. This removes your synced data and signs you out. You can also use the app fully as a guest, where progress stays on-device.
Sign in with Apple isn’t working — what do I do?
Make sure you’re on the latest version and have an internet connection, then try again. If it still fails, email info@kalibrefin.com and we’ll help. You can also continue as a guest in the meantime.