# Sleeptracker® vs King Koil Smart life

The clearest difference is rating: Sleeptracker® at 4.5 against King Koil Smart life's 2.0. Sleeptracker® also leads on review sentiment (45% vs 9%) and update cadence (every 6 weeks vs every 18 months). King Koil Smart life's advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 16.6). On price, ads and device support there is nothing between them.

Both are free to download. Sleeptracker® sells 1 in-app purchase, starting at $29.99 per year. King Koil Smart life asks for nothing beyond the download.

Sleeptracker® holds the better App Store score, 4.5 against 2.0. That said, the two scores are not equally well evidenced: Sleeptracker® has 12K ratings behind it against 59, so its average is the more settled of the two. Written reviews point the same way: 45% of Sleeptracker®'s written reviews are positive against 9% of King Koil Smart life's.

Sleeptracker® ships an update every 6 weeks, King Koil Smart life every 18 months. The most recent releases landed on September 26, 2026 and August 10, 2026 respectively.

## The numbers

| Metric | Sleeptracker® | King Koil Smart life |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (12K ratings)](https://appshunter.io/ios/app/sleeptracker/id1039995476/reviews)** | [2.0 (59 ratings)](https://appshunter.io/ios/app/king-koil-smart-life/id1495299459/reviews) |
| Number of ratings | **12K** | 59 |
| Positive reviews | **44.6% of reviews** | 9.4% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 18 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 85 MB | 83 MB |
| Requires iOS | 16.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fullpower®](https://appshunter.io/developer/282995850) | [iOBED, Inc.](https://appshunter.io/developer/1445840001) |

## What reviewers say

### Sleeptracker®

[App page](https://appshunter.io/ios/app/sleeptracker/id1039995476)

This app requires specific hardware to function, acting as a companion to smart bed monitors. It provides detailed sleep analysis, including sleep stages, heart rate, and respiration, with personalized AI coaching to help improve sleep quality. Features include a smart alarm and integration with Apple Health.

**Highlights:** Detailed sleep stage tracking (REM, light, deep), Respiration and heart rate monitoring, AI Sleep Coach with personalized tips, Sleep cycle alarm for optimal wake-up, Automatic sleep monitoring (no hardware to wear), Integration with Apple Health

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sleeptracker Premium Service | $29.99 | per year |

**What reviewers like**

- 🚀 Accurate sleep tracking
- 📊 Valuable insights and data
- 👍 Easy to set up and use
- 💤 Helps improve sleep quality

**What reviewers complain about**

- 🐛 Connectivity issues
- ⏰ Inaccurate sleep/wake times
- 🔌 Requires dedicated hardware
- 🤔 Confusing user interface

**Reported bugs**

- Alarm issues (playing randomly, incorrect times)
- Inconsistent sleep tracking (missing data, incorrect readings)
- Connectivity problems (frequent disconnections)

**Requested features**

- Snore tracking
- Ability to edit sleep data
- Better integration with health apps
- Multiple alarm/sleep schedule options


### King Koil Smart life

[App page](https://appshunter.io/ios/app/king-koil-smart-life/id1495299459)

This app controls a smart mattress system that adapts to your body and movement. It offers a massaging relaxation mode, dual firmness controls, and tracks your sleep quality. Wake up gently with its smart alarm feature.

**Highlights:** Body sensing technology, Massaging relaxation mode, Dual firmness controls, Sleep quality data, Smart alarm

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sleeptracker® free?

Sleeptracker® is free to download, with in-app purchases available.

### Is King Koil Smart life free?

King Koil Smart life is free to download, with no in-app purchases.

### Which has better reviews, Sleeptracker® or King Koil Smart life?

Sleeptracker® is rated higher. Sleeptracker® averages 4.5 out of 5 from 12K ratings, while King Koil Smart life averages 2.0 from 59 ratings.

### Do Sleeptracker® or King Koil Smart life have ads?

Neither Sleeptracker® nor King Koil Smart life shows ads.

### Which is updated more often, Sleeptracker® or King Koil Smart life?

Sleeptracker® ships an update every 6 weeks, and King Koil Smart life every 18 months. Most recently, Sleeptracker® was updated on September 26, 2026 and King Koil Smart life on August 10, 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.*