Sleep Key - Tracker, Sound

Sleep Key - Tracker, Sound

Track Sleep, Snore & Sounds

6 ratings
4 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • January 8, 2026
  • March 30, 2026

Features

Sleep Key - Tracker, Sound screenshot #1 for iPhone
Sleep Key - Tracker, Sound screenshot #2 for iPhone
Sleep Key - Tracker, Sound screenshot #3 for iPhone
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About

This app analyzes your sleep patterns, detects snoring and environmental noise, and offers a smart alarm to wake you during your lightest sleep phase. It also correlates sleep quality with weather conditions and integrates with health data to provide insights for better rest.

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
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What's New in Sleep Key

1.0.17

March 30, 2026

bugs were fixed

Subscription plans

Annual

Premium (Annual)

$59.991 Year
How to cancel Sleep Key subscription ⁉️

User reviews

Easy and straightforward

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.

Disappointed

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.
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Response from developer

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!

Forced 5 stars

Developer says if I give him 5 stars he's giving me year of premium

Finally, sleep I can actually track!

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!

Developer apps

FAQ

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.