Can I persist/restore Observable from disc?

Nope. In general, can’t save callbacks to disk, they’re essentially pointers to objects.

Yea wishful thinking, this is going to be painful

It sounds like an odd problem to try to solve. What does your overall architecture look like? What componet(s) are responsible for providing triggers? What causes triggers to be added?

If I dumb it down, essential its

syncTriggerRelay.flatMap { trigger ->
   Observable.timer(trigger.scheduleIn, .. )
      .flatMap { repo.fetchAndSyncData }
}

You can’t just fetch new data when your app starts?

Well, that might be too soon, if app is restarted before the timer, prolly not the end of the world to have the timer again, but I need to persists the requests anyways