# Sleep Key - Tracker, Sound — Track Sleep, Snore & Sounds > Intelligent sleep tracker, smart alarm, and sleep analyzer for better rest. (iPhone/iPad app by Waqto LLC.) - Source: https://appshunter.io/ios/app/sleep-key-tracker-sound/id6756638306 (this page in markdown: same URL + `.md`) - Developer: [Waqto LLC](https://appshunter.io/developer/1546456454) - Category: Health & Fitness - Price: Free with in-app purchases - Rating: 4.00/5 from 6 App Store ratings · 4 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 144 MB - Languages: English - Released: 2026-01-08 - Data updated: 2026-06-04 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/sleep-key-tracker-sound/id6756638306/reviews.md ## What is Sleep Key? Stop waking up tired. Master your rest with Sleep Key. Sleep Key is the intelligent sleep tracker, smart alarm, and comprehensive sleep analyzer designed to help you build better bedtime habits. By combining clinical-grade data analysis with your device's advanced sensors, Sleep Key gives you a complete picture of what happens when the lights go out. Whether you struggle with snoring, insomnia, sleep debt, or simply want to optimize your morning routine, Sleep Key provides the data you need to wake up feeling energized, not groggy. THE PROBLEM: WHY ARE YOU TIRED? Traditional alarm clocks ignore your body's biological needs. They jolt you awake at a specific time, often interrupting a cycle of deep sleep or REM sleep. This leaves you with "sleep inertia"—that groggy, heavy feeling that even coffee can barely fix. Furthermore, environmental factors like room noise, temperature, and even the weather outside can secretly sabotage your recovery. THE SOLUTION: Sleep Key turns your phone into a private sleep laboratory. It monitors your movements, heart rate, respiratory rate, and bedroom sounds to determine exactly where you are in your sleep cycle. CORE FEATURES INTELLIGENT SMART ALARM Wake up at the perfect moment. Sleep Key monitors your sleep cycles in real-time. Instead of a fixed time, you set a 30-minute wake-up window. The app waits for your lightest sleep phase—when your body is naturally ready to wake up—and gently activates the alarm. The result? You wake up feeling refreshed, alert, and ready to conquer the day. ADVANCED SNORE AND AUDIO RECORDER Do you talk in your sleep? Do you snore? Is a noisy neighbor ruining your night? • Snore Detection: Automatically detects and isolates snoring sounds. Useful for identifying trends or sharing with a doctor. • Sleep Talking: Capture funny or insightful moments from your dreams. • Environmental Noise: Analyze ambient noise levels to see if your bedroom is too loud for deep sleep. • Playback: Listen to your audio highlights the next morning. EXCLUSIVE: WEATHER AND SLEEP CORRELATION Sleep Key is one of the only trackers that correlates your sleep quality with local weather conditions. • Barometric Pressure: See if pressure changes cause you restless nights. • Temperature & Rain: Discover if you sleep deeper during thunderstorms or heatwaves. • Data-Driven Insights: Use this data to adjust your room temperature or bedding for a better night's rest. HEALTH AND VITALS MONITORING We go beyond simple time tracking. Sleep Key leverages Apple Health integration and device sensors to track vital metrics: • Heart Rate Analysis: Visualize your resting heart rate curve. A "dip" in heart rate is a key indicator of restorative sleep and physical recovery. • Respiratory Rate: Monitor your breathing variance to detect irregularities or potential obstructions. • Sleep Stages: View detailed graphs showing exactly how much time you spent in Light Sleep, Deep Sleep, and REM (Rapid Eye Movement). SLEEP NOTES AND LIFESTYLE TAGS Track how your daily choices affect your night. Tag your sessions with variables like "Caffeine," "Alcohol," "Late Workout," "Stress," or "Screen Time." Over time, Sleep Key will show you specifically which habits are hurting your sleep quality score. 100% PRIVATE AND OFFLINE Your health data is personal. Most sleep apps require you to create an account and upload your intimate bedroom recordings to the cloud. Sleep Key is different. We prioritize on-device processing to ensure your privacy. WHO IS THIS APP FOR? • People who wake up feeling groggy or exhausted. • Partners trying to prove who snores louder. • Athletes focused on recovery and physical performance. • Bio-hackers interested in the quantified self. • Anyone who wants to understand their health without sacrificing privacy. Start sleeping better tonight. Download Sleep Key today. Terms of Use: https://moesaid.com/projects/sleep-key/terms-of-use ## Key features - Intelligent smart alarm - Snore and audio recorder - Environmental noise analysis - Weather and sleep correlation - Heart rate and respiratory rate monitoring - Sleep stage tracking - Apple Health integration ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Annual | $59.99 | per year | | Premium (Month) | $9.99 | per month | ## Recent user reviews (4 of 4) All indexed reviews: https://appshunter.io/ios/app/sleep-key-tracker-sound/id6756638306/reviews.md ### 5/5 — Easy and straightforward *2026-03-02* I’ve tried a lot of sleep apps, and most feel cluttered or complicated. The app is simple, clean, and very easy to use. I especially love being able to listen to YouTube without constant ads interrupting my sleep. It does exactly what it promises without overcomplicating things. ### 3/5 — Disappointed *2026-02-06* The app currently blocks use until all permissions are granted, including tracking. Apple’s guidelines treat tracking as optional, so I’d love to see this handled more transparently. This is unfortunate because I really appreciate how clean and straightforward the UI is. Everything feels calm and easy to use, which is exactly what you want in a sleep app. There’s nothing overly complicated or distracting, and it’s simple to find what you need without having to navigate through lots of menus. The sleep sound options are fantastic, and I especially love the flexibility to use external sources like YouTube instead of being stuck with a set sound library. That kind of openness is a huge plus. Sleep tracking and evaluation feel genuinely helpful without being too much. The app focuses on useful insights and patterns without cluttering the experience with unrelated features or generic wellness advice. It strikes a nice balance between being informative and staying out of the way. **Developer response:** Thank you so much for the detailed and thoughtful feedback! We’re thrilled you enjoy the clean UI and the flexibility of using external sounds like YouTube. We wanted to let you know that we have officially fixed the issue you mentioned in version 1.0.14 and up. Tracking permissions are now fully optional, and the app no longer blocks usage if they aren't granted. We value your privacy and aim for total transparency. We’d love for you to try the latest update, and if you're happy with the change, we’d be grateful if you’d consider updating your rating. Sleep well! ### 1/5 — Forced 5 stars *2026-02-05* Developer says if I give him 5 stars he's giving me year of premium ### 5/5 — Finally, sleep I can actually track! *2026-02-05* Nyxa has completely changed my sleep routine. The sounds are so calming, and I love seeing my sleep data each morning. Simple, beautiful, and actually works. 10/10 recommend! ## Frequently asked questions about Sleep Key ### What is Sleep Key's smart alarm feature? Sleep Key's smart alarm monitors your sleep cycles in real-time. Instead of a fixed time, you set a 30-minute wake-up window, and the app gently activates the alarm during your lightest sleep phase, helping you wake up feeling refreshed. ### Can Sleep Key detect snoring and other noises? Yes, Sleep Key features an advanced snore and audio recorder that automatically detects and isolates snoring sounds, captures sleep talking, and analyzes environmental noise levels in your bedroom. You can listen to audio highlights the next morning. ### Does Sleep Key track health vitals? Yes, Sleep Key goes beyond simple time tracking. It leverages Apple Health integration and device sensors to track heart rate analysis, respiratory rate, and detailed sleep stages (Light, Deep, REM). ### How does Sleep Key correlate weather with sleep? Sleep Key is unique in correlating your sleep quality with local weather conditions, including barometric pressure and temperature/rain. This data helps you understand how environmental factors might be affecting your rest. ### What is the pricing for Sleep Key? Sleep Key is free to download and use. It offers optional subscription plans, including a Premium Monthly subscription for $9.99 and an Annual subscription for $59.99, for enhanced features. ### Does Sleep Key have ads? No, Sleep Key does not contain advertisements. The app is ad-free, allowing for an uninterrupted user experience focused on sleep tracking and analysis. ### What devices is Sleep Key available on? Sleep Key is currently supported on iPhone and iPod devices, as indicated by the platform compatibility data. ### How often is Sleep Key updated? Sleep Key was last updated on March 18, 2026, with version 1.0.16. This indicates a relatively recent update, suggesting ongoing development and maintenance. ## Version history (last 5 releases) ### 1.0.17 — 2026-03-30 bugs were fixed ### 1.0.16 — 2026-03-18 added post-session ### 1.0.14 — 2026-03-10 Bedtime Reminders Never miss your bedtime again! Sleep Key now sends you a gentle reminder 30 minutes before your scheduled sleep time — every night, automatically. - Smart Notifications Reminders stay in sync with your sleep goal, change your bedtime and they update instantly Notifications are scheduled a full month ahead and replenish automatically - Under the Hood Updated all dependencies for improved stability and performance Bug fixes and optimizations ### 1.0.13 — 2026-01-27 Rebranding the app to Nyxa & removing the trademark of SleepIQ ### 1.0.12 — 2026-01-19 Stability & Reliability - Enhanced error handling with new Result pattern across all services - App now gracefully handles network issues and edge cases without crashing - Improved app resume behavior when returning from background Bug Fixes - Fixed crash during account deletion requiring recent authentication - Fixed "document not found" errors for new users during sign-in - Improved reliability of profile updates Security - Added secure re-authentication flow for sensitive operations (account deletion) - Errors are now properly logged for faster issue resolution ## More apps by Waqto LLC - [Waqto - Express, Share, Earn](https://appshunter.io/ios/app/waqto-express-share-earn/id1551085720) All apps by Waqto LLC: https://appshunter.io/developer/1546456454 --- *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 2026-06-04.*