Sleep Timer
Ambient sounds that fade out as you drift off
Pick a sound, set your duration, and let it play. No alarm. The volume slowly drops to zero over 30 seconds so you won't be jolted awake.
Sleep duration:
Ambient sound:
Space to start/pause · R to reset · F for fullscreen
How the Sleep Timer Helps You Fall Asleep
The problem with most timers is they end badly — a sudden beep that snaps you out of whatever half-asleep state you'd managed to reach. This one doesn't do that.
You choose how long you want the sounds to play. When the countdown hits zero, the volume starts dropping. Over 30 seconds it goes from wherever you set it all the way down to silence. By then you're either asleep (and won't notice) or close enough that the quiet fade doesn't interrupt anything.
The ambient sounds themselves help too. Steady background noise masks environmental sounds — a neighbor's TV, traffic, someone in the next room. Your brain has an easier time switching off when it's not reacting to random sounds every few minutes.
Which Sounds Work Best for Sleep?
Rain
Soft and consistent. The low-frequency rumble is soothing without being monotonous. A good first choice if you're not sure where to start.
Ocean
Has a gentle rhythm to it. Some people find that predictable ebb and flow helps them breathe slower. Others find it too dynamic — worth trying.
Forest
Wind through leaves with occasional bird sounds. Less uniform than pure noise, which some people prefer — it feels more like actually being outside.
White Noise
Equal energy across all frequencies — the classic. Works really well if you live somewhere loud. It covers the full range of disruptive sounds.
Brown Noise
Deeper and warmer than white noise. The lower pitch feels less harsh on the ears — many people who dislike white noise find brown noise much easier to sleep to.
Frequently Asked Questions
What is a sleep timer?
A sleep timer plays ambient sounds for a set duration and then fades them out quietly — no alarm. Unlike a regular countdown timer that beeps when it ends, a sleep timer is designed to stop without waking you up.
How long should I set the sleep timer?
Most adults fall asleep within 10–20 minutes when conditions are right. A 30-minute timer covers you comfortably. If you take longer to wind down, 45 or 60 minutes gives you more runway. The 20-minute preset is a popular sweet spot.
Which ambient sound is best for sleep?
Brown noise and rain are the most popular for sleep because of their lower-frequency character — they feel warm rather than sharp. White noise is better at masking external sounds in noisy places. The honest answer is to try a couple and see which one you stop noticing fastest.
Does the sleep timer play an alarm when it ends?
No. The volume fades from your chosen level down to zero over 30 seconds. There's no beep, chime, or notification. If you're asleep, you won't hear it stop. That's the whole idea.