Sleep Sine: Sleep Sounds
Drift to sleep. Yours to tune.
About
Drift off to sleep with generative ambient scenes that create unique audio and visuals every night. Customize and save your favorite mixes, with a sleep timer and background playback for uninterrupted rest. Enjoy a private, ad-free experience with a one-time purchase.
What's New in Sleep Sine
1.2.2
August 6, 2026
Sleep Sine now runs on iOS 18 and later, so it works on many more devices. Plus general maintenance and updated components.
MoreIn-App Purchases
$5.99
Unlock All Scenes
All scenes + unlimited presets. No subscription.
Developer apps
FAQ
Does Sleep Sine have ads?
No, Sleep Sine is completely ad-free. The developer explicitly states 'No ads. No account. No tracking. Ever.' for a distraction-free experience.
How much does Sleep Sine cost?
Sleep Sine is a one-time purchase and is currently listed as 'Free'. There are no subscriptions or in-app purchases required to access all features.
What devices is Sleep Sine available on?
Sleep Sine is available for iPhone, iPad, and Apple TV. A single purchase covers all devices through Family Sharing.
How often is Sleep Sine updated?
The latest version is 1.1, released on May 24, 2026. While specific update frequency isn't detailed, this indicates recent active development.
What makes Sleep Sine's audio unique?
Sleep Sine uses generative audio with layered samples that crossfade at random offsets, ensuring no two nights sound exactly the same. The 'Deep Space' scene uses pure noise synthesis for even more variation.
Can I customize the scenes in Sleep Sine?
Yes, each scene offers 8-12 sliders to tune and customize. You can save your custom mixes and share them with others via a short code.
Is Sleep Sine suitable for all ages?
Yes, Sleep Sine has an age rating of '4+' and is designed to be a safe and relaxing experience for a wide range of users.
Does Sleep Sine track user data?
No, Sleep Sine prioritizes user privacy. It has no servers operated by the developer, no accounts, no analytics, and no third-party SDKs. Your presets sync via your own iCloud.