# Eight Sleep vs DeltaFLOW

The clearest difference is in-app purchases: DeltaFLOW at none against Eight Sleep's 2. DeltaFLOW also leads on iOS requirement (13.0 vs 18.0). Eight Sleep's advantage is device support. On price there is nothing between them.

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

## The numbers

| Metric | Eight Sleep | DeltaFLOW |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (18K ratings)](https://appshunter.io/ios/app/eight-sleep/id1086913845/reviews)** | — |
| Number of ratings | **18K** | — |
| Positive reviews | 28.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | Every 4 days | — |
| Monetization | Free with in-app purchases | — |
| Size | 259 MB | 39 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | **iPhone, iPad** | — |
| Age rating | 12+ | 4+ |
| Developer | [Eight Sleep, Inc](https://appshunter.io/developer/1105586839) | [DELTA FAUCET COMPANY](https://appshunter.io/developer/340966141) |

## 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


### DeltaFLOW

[App page](https://appshunter.io/ios/app/deltaflow/id6481261911)

**In-app purchases:** none


## Frequently asked questions

### Is Eight Sleep free?

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

### Is DeltaFLOW free?

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

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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.*