CalcFit Support
Last updated: October 14, 2026
Most questions about CalcFit have a quick answer below. If yours isn't here, write to us and a real person will read it. CalcFit: Mental Math is published by John Osakwe (Etest Tech Hub) for iPhone and Android. CalcFit is for teens and adults, aged 16 and over.
Contact us
Email info@etestweb.com. We aim to reply within 2 business days, though it can take longer at busy times. We can't guarantee a reply time.
Common questions
How do I restore my purchases?
On iPhone: sign in to the Apple ID you bought with (Settings, your name), install CalcFit, open Settings in the app and tap Restore purchases. On Android: open Google Play and check you are signed in to the Google account you bought with, install CalcFit, open Settings in the app and tap Restore purchases. There is no CalcFit login to remember. Restoring needs an internet connection. If your plan doesn't appear, email us with your order ID.
How do I cancel a subscription?
Cancel in your store account, at least 24 hours before the renewal date (or before the free trial ends, to avoid the first charge). On iPhone: Settings, tap your name, Subscriptions, CalcFit, Cancel. On Android: Google Play, tap your profile, Payments & subscriptions, Subscriptions, CalcFit, Cancel subscription. Deleting the app does not cancel a subscription, and you keep access until the paid period ends.
How do I get a refund?
Apple and Google take the payment, so they handle refunds. Request one from Apple at reportaproblem.apple.com, or through Google Play's refund help. We can't refund a store purchase ourselves.
My daily reminder isn't arriving. What should I check?
Check that notifications are allowed for CalcFit in your device settings, that a reminder time is set in CalcFit's Settings, and that battery saver or Focus modes aren't hiding it. Reminders are scheduled on your device only, so they need no internet connection. After a restart or an app update, open CalcFit once. If it still doesn't arrive, email us your device model and OS version.
Where is my progress stored? Can I lose it?
Your progress, streak and settings are stored only on your device, and we hold no copy. If you uninstall the app, clear its storage or lose the device, they can't be recovered. Purchases are not affected, because Restore purchases brings back your plan.
How do I report a problem or suggest something?
Email us. It helps to include your phone model, your iOS or Android version, the CalcFit version, and what you were doing when the problem happened. A screenshot is useful. Please don't send passwords or payment card details.
How do I make a privacy or data request?
Email us with what you'd like to do (access, correct, delete or object). CalcFit has no account and keeps your practice data only on your device, so uninstalling the app deletes it. For purchase records held by RevenueCat, write from the address on your store receipt or include your order ID, and we'll act on it within one month.