I paid for Premium in App Store, but Premium features are still unavailable
Unfortunately, Apple sometimes fails to promptly pass us your payment information. To speed up the process, please do the following:
Go to Menu — Account.
Tap Purchases.
I tried it, but the app tells me the subscription already belongs to another user
It mostly happens when, after logging out of Welltory, you log back in using another email address. Please do the following:
Check if you’re logged in to Welltory with the same email address you used when you paid for the subscription.
If you’re not sure it’s the same email address, try logging in to Welltory using your Apple ID, anonymous Apple ID (ending with @privaterelay.appleid.com), or your other email addresses.