Kumofuton Support

Please don't swipe the app away from the app switcher. On Android, go to Settings > Apps > Kumofuton > Battery and choose Unrestricted. Power-saving modes on some devices can also stop background audio.

Yes. In Kumofuton's settings, turn on "Play with other apps." It takes effect the next time you start a sound.

On the home screen, tap "Add a sound" in the card. You can add up to two sounds and adjust each volume with its slider.

Tap the timer line in the card. Pick a length in one tap, or choose any length with the hour and minute wheels. Up to 15 minutes is free; longer timers and playing with no timer come with Kumofuton Plus.

On iOS 26 and later, yes: it rings as a system alarm even in Silent mode or a Focus. On earlier iOS versions it rings as a notification, so please allow notifications for Kumofuton. It then rings once for 30 seconds and does not sound in Silent mode or a Focus.

An alarm set to "Once" turns itself off after it rings. To keep it on, choose a repeat such as "Every day" or "Weekdays".

The recordings are CC0 (public domain) sounds from Freesound. Each sound's details screen shows its source and, when the recordist stated them, the place and date. The kitchen fan, air conditioner, washing machine, and hair dryer were generated with Adobe Firefly; the noises and the womb sound are generated by Kumofuton.

Kumofuton is free to download, and every sound is free. Layering, a sleep timer of up to 15 minutes, and one wake-up alarm are free too. Kumofuton Plus is a one-time purchase that adds longer timers, playing with no timer, and more than one alarm. There are no ads or subscriptions, and nothing is ever charged automatically. If you bought the earlier one-time unlock, you already have Plus; on a new device, tap "Restore purchases" in Settings.