Hi there, I want to make a Love Notes App where a couple gets one question about their partner each day. The answer gets sent to the partner. The past answers should be watchable in a separate tab. I´m not sure where to start. Do you have suggestions on how to set up the app, what frameworks to use, etc.?

If you're planning on using SwiftUI for this app I'd suggest the video linked as a good starting point and as for the rest of your idea take a look at CloudKit or similar (Paul covers CloudKit in the Ultimate Portfolio App series)

https://www.hackingwithswift.com/books/ios-swiftui/designing-a-single-card-view