# Sleep Sine: Sleep Sounds — Drift to sleep. Yours to tune. > Generative ambient soundscapes and visuals for sleep, with customization and privacy. (iPhone/iPad app by Embay, LLC.) - Source: https://appshunter.io/ios/app/sleep-sine-sleep-sounds/id6761825808 (this page in markdown: same URL + `.md`) - Developer: [Embay, LLC](https://appshunter.io/developer/1730783354) - Category: Health & Fitness, Lifestyle - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 18.0 · 364 MB - Languages: American English - Released: 2026-05-20 - Data updated: 2026-09-01 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/sleep-sine-sleep-sounds/id6761825808/reviews.md ## What is Sleep Sine? Drift to sleep with six generative ambient scenes. Audio crossfades from random offsets so no two nights sound the same — the way real rain sounds different every time you hear it. Visuals render live in Metal, not from a video loop. iPhone, iPad, and Apple TV. One purchase. No subscription. No ads. No account. No cross-app tracking. THE SCENES • Thunderstorm — distant rumbles, sheet rain on a tin roof. Free, forever. • Frequencies — a sound bath for sleep. Warm, resonant tones from the sound-therapy tradition. • Fireplace — crackling embers and the slow breath of a fire on a winter night. • Ocean Night — long swells under a moonlit sky. • Aurora Night — wandering aurora over a quiet pine canopy, rain through the leaves. • Deep Space — pure pink, green, or brown noise synthesis, slow harmonics, the hum at the edge of hearing. AUDIO THAT NEVER REPEATS Each scene's audio is built from layered samples that crossfade at random offsets — three independent layers in indefinite, never-repeating combinations. The Deep Space scene goes further: pure noise synthesis, no samples at all. VISUALS THAT NEVER LOOP Every frame is generated live in Metal from noise functions and procedural math — not played back from a video file. Rain, embers, water crests, star twinkle, aurora brightness — all driven in real time. You can leave a scene playing all night and never catch a repeat. TUNE EVERY SCENE Each scene exposes 8–12 sliders. Save custom mixes. Share them with anyone via a short code that recreates the exact scene on their device. PLAYS ALL NIGHT Background audio on iPhone runs locked-screen-off without draining your battery. A sleep timer with a soft fade lets you set it and drift. iCloud privately syncs your presets across devices. DESIGNED FOR APPLE TV Hero scenes render full-bleed on the largest screen in your house. One Family Sharing purchase covers everyone. PRIVACY Sleep Sine has no servers we operate and no accounts — your presets sync privately through your own iCloud. The only data collected is anonymous usage and crash diagnostics, through Google Firebase, to improve the app — no ads, no advertising ID, no cross-app tracking, no personal data. It's off by default in the EU, UK, and Switzerland, and you can turn it off anytime in About & Privacy. ONE-TIME PURCHASE That's it. Family Sharing enabled. ## Key features - Generative ambient scenes - Unique audio crossfades - Live procedural visuals - Customizable scene tuning - Sleep timer with fade-out - Background audio playback - iCloud preset syncing ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Unlock All Scenes | $5.99 | one-time | ## Frequently asked questions about Sleep Sine ### 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. ## Version history (last 5 releases) ### 1.2.2 — 2026-08-06 Sleep Sine now runs on iOS 18 and later, so it works on many more devices. Plus general maintenance and updated components. ### 1.2.1 — 2026-07-25 New scene: Frequencies A sound bath for sleep. Frequencies wraps you in warm, resonant tones — the 432 Hz and Solfeggio frequencies at the heart of the sound-therapy tradition — that gently ease you down toward deep sleep through the night. On headphones they settle into a soothing binaural beat; on speaker, a soft pulsing wash. A slow breathing glow drifts with the sound, and you can dim it all the way to a black, audio-only screen. Also in this update: • Warmer, richer audio across every scene • Optional anonymous usage analytics to help improve Sleep Sine — no ads, no tracking, no personal data. Off by default in the EU; turn it on or off anytime in About & Privacy. • Stability and performance improvements ### 1.2 — 2026-07-07 New scene: Frequencies A sound bath for sleep. Frequencies wraps you in warm, resonant tones — the 432 Hz and Solfeggio frequencies at the heart of the sound-therapy tradition — that gently ease you down toward deep sleep through the night. On headphones they settle into a soothing binaural beat; on speaker, a soft pulsing wash. A slow breathing glow drifts with the sound, and you can dim it all the way to a black, audio-only screen. Also in this update: • Warmer, richer audio across every scene • Optional anonymous usage analytics to help improve Sleep Sine — no ads, no tracking, no personal data. Off by default in the EU; turn it on or off anytime in About & Privacy. • Stability and performance improvements ### 1.1 — 2026-05-24 Four new ways to listen. 1. Siri and Shortcuts. "Hey Siri, play Sleep Sine." "Hey Siri, play Aurora Night on Sleep Sine." "Hey Siri, set a Sleep Sine sleep timer for 45 minutes." Five voice phrases work out of the box — no setup. Every action is also a building block in the Shortcuts app, so you can wire Sleep Sine into a bedtime Personal Automation. 2. Home Screen widget. Tap play, pause, or cycle scenes without opening the app. The Now Playing widget gained interactive buttons on iOS 17+. 3. Control Center. Add the Sleep Sine tile to Control Center and toggle playback alongside Camera and Flashlight. One tap, no app launch. 4. QR codes that just work. Scan a sine code with the iOS Camera and you'll land in the right scene with the right slider state — no Safari bounce. Universal Links across iMessage, Mail, Notes, anywhere. ### 1.0 — 2026-05-20 No release notes. ## More apps by Embay, LLC - [Smog Report](https://appshunter.io/ios/app/smog-report/id607748201) - [Wobbly Generative Art](https://appshunter.io/ios/app/wobbly-generative-art/id6760923731) - [Slow Social](https://appshunter.io/ios/app/slow-social/id6760975243) - [Sunshine State Reader](https://appshunter.io/ios/app/sunshine-state-reader/id6761107134) - [Noctales – AI Bedtime Stories](https://appshunter.io/ios/app/noctales-ai-bedtime-stories/id6761338345) All apps by Embay, LLC: https://appshunter.io/developer/1730783354 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-01.*