I use the build in calendar, with repeat events

• Whenever I cross off a task, it should sit inactive until the next recurrence interval
• Then it should automatically become active again
• I want the app to show me which task I have to perform next

Could you elaborate a bit on these requirements? It's been said already, but all of these can be accomplished with any task app. However, you've explicitly stated that you don't want that, nor do you want tasks set for a specific time or date...

🤔🤔

I understand the frustration of having a clear picture in your head of what you want, but also being unable to articulate it correctly. So, what specific behavior are you looking for in this hypothetical app that's different from a "normal" tasks app?

Tasks.org seems like it might work from a quick look.

I use Table Habit for stuff like this.

Toodledoo worked very well for me. Even had annual reminders for car tax & insurance etc.

Loop Habit Tracker is pretty good for this. In particular, it allows you to schedule stuff like ‘twice a month’, or even ‘run 10 km a week’ or somesuch. The app shows the whole list, but marks which tasks are done and which aren't yet. Plus there are notifications and widgets, but I haven't used the latter.

Best part is that it's open-source and requires nearly zero permissions. OTOH the data isn't synced anywhere.

Have you tried a spouse?

Seriously though, Structured does this for me now with some tweaking: https://structured.app/

I've been looking for the exact same thing. The closest I've found is Galarm, but it's still exact day/time based

TickTick, ReDo Loop, HabitNow, Loop Habit Tracker, Habitica, House Chores Cleaning Schedule

I use scheduled Google Tasks and let my disdain of notifications drive task completion

Supatask: https://play.google.com/store/apps/details?id=com.prosper.routines.todo.productive.fabulous.habits.selfcare

Sweepy or Tody?