How many hours between 8:00 AM and 4:00 PM?
8 hours (480 minutes).
From 8:00 AM, counting forward on the clock to 4:00 PM, is 8 hours — 480 minutes.
If these are your bedtime and wake-up time, the sleep calculator lines the alarm up with a full sleep cycle. Comparing across zones instead? See time difference between cities.
There are 8 hours between 8:00 AM and 4:00 PM — that is 480 minutes.
No overnight wrap needed — 4:00 PM is later the same day, 8 hours after 8:00 AM.
If 8:00 AM is your bedtime and 4:00 PM your alarm, that is 8 hours in bed — within the 7–9 hours most adults need. The catch is actually getting up at 4:00 PM; see the sleep calculator to line the wake-up time up with a full sleep cycle.
Not because it rings louder. Because it removes every way your half-asleep brain talks you back into bed.
Swiping an alarm away is a reflex you can perform while still asleep. A mission needs your thinking brain switched on — and once it is on, sinking back under is much harder.
Force-quit the app, restart the phone, flip it to silent, turn the volume down. The alarm re-arms and keeps going until the mission is actually done.
Photo and barcode missions are anchored to a spot in another room, so the only way to stop the noise is to stand up and walk there. You cannot pre-stage it from bed.
A sleep forecast before bed, bedtime reminders and wake-up streaks — because the 6 AM problem usually starts at 1 AM.
Captain Wake makes you complete a real-world mission to turn the alarm off — no snooze, no swipe-and-sleep.