# Eight Sleep vs Stretch Affect Training

The clearest difference is in-app purchases: Stretch Affect Training at none against Eight Sleep's 4. Stretch Affect Training also leads on device support (4 vs 2) and iOS requirement (15.1 vs 17.0). Eight Sleep's advantage is update cadence (every 3 days vs weekly). On price and ads there is nothing between them.

Both are free to download. Eight Sleep sells 4 in-app purchases, starting at $10.00 per month. Stretch Affect Training asks for nothing beyond the download.

Eight Sleep ships an update every 3 days, Stretch Affect Training weekly. The most recent releases landed on October 19, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Eight Sleep | Stretch Affect Training |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (17K ratings)](https://appshunter.io/ios/app/eight-sleep/id1086913845/reviews)** | — |
| Number of ratings | **17K** | — |
| Positive reviews | 28.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Weekly |
| Monetization | Free with in-app purchases | — |
| Size | 245 MB | 82 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 12+ | 12+ |
| Developer | [Eight Sleep, Inc](https://appshunter.io/developer/1105586839) | [Stretch Affect LLC](https://appshunter.io/developer/1504743026) |

## What reviewers say

### Eight Sleep

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

This intelligent sleep system actively manages your sleep environment by adjusting temperature and elevation. It tracks detailed sleep metrics and provides personalized insights to help you wake up feeling refreshed. The system supports individual sleep profiles for multiple users.

**Highlights:** Personalized temperature control, Automatic elevation adjustments, Sleep stage tracking, Heart rate and HRV monitoring, Snoring detection, Gentle wake-up alarms, Dual sleep profiles

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 8+ Standard (Monthly) | $10.00 | per month |
| 8+ Pro (Monthly) | $18.99 | per month |
| 8+ Standard (Annual) | $96.00 | per year |
| 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


### Stretch Affect Training

[App page](https://appshunter.io/ios/app/stretch-affect-training/id6751941988)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Eight Sleep free?

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

### Is Stretch Affect Training free?

Stretch Affect Training is free to download, with no in-app purchases.

### Do Eight Sleep or Stretch Affect Training have ads?

Neither Eight Sleep nor Stretch Affect Training shows ads.

### Which is updated more often, Eight Sleep or Stretch Affect Training?

Eight Sleep ships an update every 3 days, and Stretch Affect Training weekly. Most recently, Eight Sleep was updated on October 19, 2026 and Stretch Affect Training on September 25, 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.*