• How do I change the App’s Language?
The languages supported by the app are English, Spanish, German and Portuguese. The app will reflect the language set for MacOS. If you don’t want Grammatisch to use the same language of the operational system, you can go to System Preferences -> Language -> Apps and add a custom setting for Grammatisch
• How can I cancel my subscription?
Subscriptions can be managed by accessing your App Store account settings. Follow these subscriptions from Apple to do that: https://support.apple.com/en-us/HT202039
• How do I sync progress between devices?
In order to synchronize your progress between Mac, iPhone and iPad, you need to keep iCloud Drive enabled.
• How do I sync purchases between devices?
In order to synchronize your purchases between Mac, iPhone and iPad, you need to keep iCloud Drive enabled. You need to open the app where you made the original purchase at least once per month so that the purchase receipts can be revalidated.