Sleep sounds app: white noise, rain, and stories

Updated October 31, 2026

SleepBoo is a sleep sounds app that lets you mix up to 4 sounds, such as rain, campfire, waves, and white, pink, or brown noise, with a timer that lowers the volume gradually. It also has bedtime stories, relaxing music, and frequencies. Many people find sound relaxing, but the scientific evidence is still limited.

Coming soon to the App Store

What you can listen to

A mixer for up to 4 sounds: rain, campfire, wind, waves, white, pink, and brown noise, and more
Bedtime stories, relaxing music, and frequencies
A timer that fades the volume down little by little

Does white noise help you sleep?

The honest answer is that we don’t know yet. A 2021 systematic review of 38 studies rated the evidence that continuous noise improves sleep as very low quality. Some studies found people fell asleep faster, while another found more fragmented sleep.

So treat sound as a relaxing part of your routine, not a treatment. If it helps you wind down, keep it. If it doesn’t, try something else.

How to use sleep sounds

Keep the volume low and comfortable
Set the timer so the sound doesn’t play all night
Compare a few nights with and without sound in your statistics

Frequently asked questions

Can I mix different sounds?

Yes. You can combine up to 4 sounds at once.

Does the sound stop by itself?

Yes. The timer lowers the volume gradually.

Can I track my sleep while sounds play?

Yes. You can pick a sound during tracking, and it appears on the tracking screen.

Sources

Riedy et al., Sleep Medicine Reviews (2021): Noise as a sleep aid

SleepBoo is a wellness app and does not replace medical advice.