Sleep Frequency: Sleep Sounds

Bill Kim

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About this app

Can't switch off at night? Sleep Frequency turns your phone into a calm, dark bedside companion that plays until morning.

🌧 MIX YOUR PERFECT NIGHT
Layer up to 3 sounds — rain, ocean waves, campfire, forest, wind, waterfall and more — and balance each volume exactly how you like it.

🎧 REAL BINAURAL BEATS
Not just recordings: scientifically inspired Delta (2 Hz), Theta (6 Hz) and Alpha (10 Hz) binaural beats plus 432 / 528 / 174 Hz pure tones, generated in real time for perfectly clean sound.

🌙 PLAYS ALL NIGHT
Reliable background playback keeps your mix going for 8+ hours with handy controls right on your lock screen.

⏰ SLEEP TIMER WITH GENTLE FADE
15 minutes to 8 hours — sound fades out softly during the last minute so silence never wakes you.

🔔 BUILD A SLEEP HABIT
A gentle bedtime reminder and a daily streak help you wind down at the same time every night.

💾 MY MIXES
Save your favorite combinations and start them with one tap.

🌍 Available in 10 languages. Lightweight, simple, and free.

Download Sleep Frequency and fall asleep faster tonight. 😴

What’s new

🌙 Sleep Frequency — a complete redesign!
✨ New 4-tab home: Sounds · Music · Frequency · My Mixes
🎧 Real binaural beats: Delta (2Hz), Theta (6Hz), Alpha (10Hz) + 432/528/174Hz pure tones
🌧 Layer up to 3 sounds, balance every volume, save your perfect mix
⏰ Sleep timer (15 min–8 h) with a gentle fade-out
🔔 Bedtime reminder & daily streak to build a sleep habit
🌙 Reliable all-night playback with lock-screen controls
Sleep deeper tonight 😴