# Eight Sleep vs Sunlighten

The clearest difference is rating: Eight Sleep at 4.8 against Sunlighten's 2.7. Eight Sleep also leads on update cadence (every 4 days vs every 4 months) and ratings volume (18K vs 88). Sunlighten's advantage is in-app purchases (none vs 2) and iOS requirement (15.1 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Eight Sleep sells 2 in-app purchases, starting at $18.99 per month. Sunlighten asks for nothing beyond the download.

Eight Sleep holds the better App Store score, 4.8 against 2.7. That said, the two scores are not equally well evidenced: Eight Sleep has 18K ratings behind it against 88, so its average is the more settled of the two. Written reviews point the same way: 29% of Eight Sleep's written reviews are positive against 20% of Sunlighten's.

Eight Sleep ships an update every 4 days, Sunlighten every 4 months. The most recent releases landed on November 4, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Eight Sleep | Sunlighten |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (18K ratings)](https://appshunter.io/ios/app/eight-sleep/id1086913845/reviews)** | [2.7 (88 ratings)](https://appshunter.io/ios/app/sunlighten/id1634410434/reviews) |
| Number of ratings | **18K** | 88 |
| Positive reviews | **28.7% of reviews** | 19.8% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 4 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 259 MB | 53 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 17+ |
| Developer | [Eight Sleep, Inc](https://appshunter.io/developer/1105586839) | [Sunlighten Inc](https://appshunter.io/developer/1634410436) |

## What reviewers say

### Eight Sleep

[App page](https://appshunter.io/ios/app/eight-sleep/id1086913845)

This advanced sleep system intelligently adjusts temperature and elevation for personalized comfort. It tracks detailed sleep metrics and provides insights to help you wake up refreshed. The system supports up to two users with individual profiles and learns over time.

**Highlights:** Personalized temperature control, Automatic sleep stage tracking, Heart rate and HRV monitoring, Smart alarm with vibration, Dual user sleep profiles, AI-driven sleep insights

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 8+ Pro (Monthly) | $18.99 | per month |
| 8+ Pro (Annual) | $179.99 | per year |

**What reviewers like**

- 🚀 Amazing sleep quality
- 🌡️ Effective temperature control
- 📊 Detailed sleep tracking
- 🤖 Helpful AI features
- 🏆 Great customer service

**What reviewers complain about**

- 🐛 Buggy app with frequent crashes
- 🔌 Requires constant internet connection
- 🕰️ Alarm and temperature controls not intuitive
- 🔄 Inconsistent sleep data and metrics
- 💰 Expensive with mandatory subscription

**Reported bugs**

- App freezes and loses connection to pod
- Alarms not working or turning off properly
- Temperature settings not saving or resetting
- Sleep data not syncing or displaying accurately
- Frequent app crashes and performance issues

**Requested features**

- Apple Watch app integration
- Offline temperature/alarm controls
- Customizable sleep tracking and insights
- Improved alarm snooze/dismiss functionality
- Nap mode and more sleep schedule flexibility


### Sunlighten

[App page](https://appshunter.io/ios/app/sunlighten/id1634410434)

Optimize your well-being with this app, designed to enhance your light therapy and sauna experiences. Create personalized wellness programs, track sessions in real-time, and control your devices remotely for a seamless health journey.

**Highlights:** Science-based wellness programs, Personalized program creation, Real-time session tracking, Remote sauna control (Wi-Fi), Audio and lighting management, Red light therapy panel programs

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Convenient remote control
- 👍 Customizable programs
- 🚀 Easy to use app
- 👍 Enhances sauna experience

**What reviewers complain about**

- 🐛 Unreliable app connectivity
- 🔒 Privacy concerns with data collection
- 🐛 Inconsistent scheduling and remote start
- 🐛 Buggy and glitchy app
- 👎 Limited remote functionality

**Reported bugs**

- App fails to connect to sauna
- Scheduled programs not running as expected
- Inconsistent lighting controls
- Tablet frequently restarts or loses connection

**Requested features**

- Remote start and preheat capability
- Improved app stability and reliability
- Better integration between app and sauna
- More customization options


## Frequently asked questions

### Is Eight Sleep free?

Eight Sleep is free to download, with in-app purchases available.

### Is Sunlighten free?

Sunlighten is free to download, with no in-app purchases.

### Which has better reviews, Eight Sleep or Sunlighten?

Eight Sleep is rated higher. Eight Sleep averages 4.8 out of 5 from 18K ratings, while Sunlighten averages 2.7 from 88 ratings.

### Do Eight Sleep or Sunlighten have ads?

Neither Eight Sleep nor Sunlighten shows ads.

### Which is updated more often, Eight Sleep or Sunlighten?

Eight Sleep ships an update every 4 days, and Sunlighten every 4 months. Most recently, Eight Sleep was updated on November 4, 2026 and Sunlighten on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*