“Due now” = you can meet them today. “Too early” = a visit is still owed, but the gap since the last one is too short.
The app warns you if you try to mark a doctor visited again within this many days, so you don't double-visit. Doctors still inside their gap also show faded & struck-through in the Day-planning picker.
Used for the Coverage page. Monthly target = this number × working days (Sundays excluded).
Shows a reminder notification at this time while the app is open. Keep the app installed and open it daily for best results.