What is Calma?
Calma is a sleep sounds, relaxation and focus app for Android and iOS. Mix rain, nature sounds, white noise and brown noise into your own soundscapes. It has a free version and an optional one-time PRO unlock, with no recurring subscription.
Airplane Mode Friendly
The offline sleep sounds app for deep rest anywhere
Turn off your Wi-Fi and disconnect from the world. Calma works 100% offline so you can enjoy personalized soundscapes without distractions, data usage, or buffering.
Perfect for Travel
Whether you are on a long flight, a train ride, or staying in a hotel with poor Wi-Fi, Calma's offline capability ensures you always have your sleep sounds ready.
Zero Data Usage
Unlike streaming apps, Calma doesn't consume your mobile data. The sounds are mixed directly on your device.
Privacy First
No need to worry about constant tracking. Put your phone in airplane mode to reduce EMF exposure and sleep peacefully.
FAQ
Frequently Asked Questions
Does Calma work offline?
Yes, once downloaded, Calma works completely offline. You don't need a Wi-Fi or cellular connection to mix and listen to your sleep sounds.
Can I use Calma on an airplane?
Absolutely. Calma is perfect for flights because it works entirely in airplane mode without buffering or loading screens.
Is there a sleep sounds app that doesn't use data?
Yes, Calma is a privacy-first sleep sounds app that doesn't stream audio. All sounds are processed locally on your device, meaning it won't consume your mobile data while playing.
