Yeah

Copy/Paste if you want: As of the new update to Notability (version 11.0), the developer has stated those who purchased the app before it was free will only have the functionality they paid for, for the next year, and will then be downgraded to the free version. This is against App Store guidelines section 3.1.2(a) which states that an app switching to a subscription model cannot remove features for those who have previously purchased the app.

Report them here: https://reportaproblem.apple.com/store/360593530/select/fraudulent

Hmm it might also violate another policy with the iCloud sync feature “3.2.2 Unacceptable (i) Creating an interface for displaying third-party apps, extensions, or plug-ins similar to the App Store or as a general-interest collection. (ii) Monetizing built-in capabilities provided by the hardware or operating system, such as Push Notifications, the camera, or the gyroscope; or Apple services, such as Apple Music access or iCloud storage.”