Amicu is basically SwiftUI on top of a local SQLite db. It supports tracking the last contact date, catchup reminders, birthday reminders, Siri, Shortcuts (for semi automatic workflows), and widgets. Save the main comm app per contact (WhatsApp, Telegram, FB, etc.) for batch messages like a birthday event invite.
Feedback is welcome.
I'm not sure what "mark people as in touch" is, and to me it sounds the same as adding someone from your contact, but it looks like this is a different operation from adding a contact to the list.
I like the "more" tab and its contents.
Out of curiosity, as I'm interest and work in UX, did you test this app with some real people / how did you test its UX?
Marking someone in touch means you interacted with this person somehow for example you met or called. This sets the last contact date to today. This is used for reminders to catchup after some time and sorting the contact list to see which contacts you met recently and where it's been some time.
Setting in touch and adding contacts uses a similar UI, which can be confusing in the beginning. I need to improve this. Thanks!
You can also contact me at kai@amicu.app, if you've more questions or feedback.