if Kotlin's

fixedRateTimer

function appropriate and accurate enough to create a countdown timer? And is there any problem with launching a coroutine inside the timer action block?

fun startTimer() {
        timer?.cancel()
        applicationScope.launch {
            val selectedTask = selectedTask.first()
            if (selectedTask != null) {
                taskDao.updateLastActiveTimestamp(selectedTask.id, System.currentTimeMillis())
                startTimerService()
                timerRunningFlow.value = true
                timer = fixedRateTimer(period = TICK_DELAY) {
                    applicationScope.launch {
                        taskDao.increaseMillisCompletedToday(selectedTask.id, TICK_DELAY)
                    }
                }
            }
        }
    }

kotlin.concurrent.fixedRateTimer uses java.util.Timer which uses java.lang.Object.wait whose precision varies by platform. how accurate does your countdown timer need to be?

@ephemient It's for a stopwatch, but let's say 5 seconds difference on 30 minutes would be bearable

Yes it's fine for a stopwatch, the precision Eph is talking about is at worst +/- 10ms.

Alright, thank you!

assuming you're on Android?

good to know, thank you!