Sleep sounds with no subscription.

Most sleep apps rent you rain by the month. Cancel and the library stops. Ambiance is the other deal: download the Android APK from this site, mix for free, and pay once if you want the rest.

Free is Deep Rain, Brown Noise, White Noise, and a 15-minute fade timer. Pro is $20 NZD one time through Stripe — ocean, thunder, wind, fan, creek, cabin, crickets, campfire, pink noise, the Solfeggio set, and 30-minute / 1-hour / 2-hour timers.

There is no account and no ad layer. You keep Pro on that phone after you redeem the unlock code. Built in New Zealand by OwnForge.