Calma: Sleep Sound Mixer
White & brown noise, rain, fan
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Layer rain over brown noise, add a fan, set a timer that fades out instead of
cutting off. 193 sounds, all offline. One purchase, no subscription.
Most sleep apps hand you a playlist. Calma hands you a mixer.
Layer steady rain over deep brown noise, drop a ceiling fan underneath, set the
volume of every layer separately, and fall asleep to a sound that is actually
yours. Then save it and start the same thing tomorrow with one tap.
WHY CALMA IS DIFFERENT
• A real mixer — up to 6 layers at once, each with its own volume slider.
• One-time purchase. No subscription, no renewals, no "trial ending" emails.
• Fully offline. Every sound ships inside the app: no streaming, no data use,
works in airplane mode.
193 SOUNDS
White, pink and brown noise. Steady rain, heavy rainstorms and distant thunder.
Ocean, forest streams and wind through trees. Campfires and fireplaces. Ceiling
fans, washing machines, hair dryers and vacuum hum. Trains, ticking clocks and
quiet rooms. Crickets, birds and night breeze. Soft piano and tuning
frequencies (174, 396, 432 and 528 Hz).
A TIMER THAT DOESN'T WAKE YOU
Set it and forget it. Calma fades the whole mix down gradually instead of
cutting the sound off, so the silence arrives before you notice it.
BRAINWAVE LAB
Binaural beats running alongside the mixer — move the slider to pick your
frequency and layer it under rain or noise. Smart Descent walks the beat down
to 2 Hz (Delta) over 20 minutes for a hands-off transition into sleep.
Headphones recommended.
BREATHE FIRST
A two-minute breathing animation, including 4-7-8, to slow your body down
before the mix even starts.
FOR BABIES AND TODDLERS
White noise, womb sounds, heartbeat, lullaby music box, hair dryer, washer and
calm car-ride hum, all in one category.
FREE AND PRO
Free, with no time limit: 55 sounds, 3 layers at once, 5 saved mixes, the sleep
timer and the breathing exercise.
PRO unlocks all 193 sounds, 6 simultaneous layers, 25 saved mixes, Smart
Descent and the full Brainwave Lab range — for a single payment, forever.
Sleep well.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• More reliable purchase restore and clearer handling of connection errors.
• Better timing for in-app messages, so nothing interrupts a running session.
• Stability fixes across the mixer.
The developer, MATEUSZ KOZŁOWSKI, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- MATEUSZ KOZŁOWSKI
- Size
- 145.9 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
13+
- 13+
- Infrequent
Medical Treatment information
Contains
Advertising
Health or Wellness Topics
- In-App Purchases
Yes
- Calma PRO Lifetime Launch $12.99
- Calma PRO Lifetime $14.99
- Copyright
- © 2026 Mateusz Kozłowski / MitySoft