# SLEEPON 3 vs K

The clearest difference is iOS requirement: SLEEPON 3 at 13.0 against K's 16.4. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | SLEEPON 3 | K |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (40 ratings)](https://appshunter.io/ios/app/sleepon-3/id6497714109/reviews)** | — |
| Number of ratings | **40** | — |
| Positive reviews | 35.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free | — |
| Size | 67 MB | 65 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Shenzhen Sleepon Technology Co., Ltd.](https://appshunter.io/developer/1385995936) | [A Cell Global Sdn Bhd](https://appshunter.io/developer/1783534947) |

## What reviewers say

### SLEEPON 3

[App page](https://appshunter.io/ios/app/sleepon-3/id6497714109)

This system provides a home sleep testing solution using a wearable device and a mobile app. It analyzes sleep data to identify potential issues and build long-term sleep profiles for proactive risk assessment. It's designed for various age groups and individuals with specific health concerns.

**Highlights:** Home sleep testing system, Wearable sleep ring, Companion mobile application, sleepFit™ algorithm, Vital biological data capture, Sleep health issue identification, Long-term sleep profile establishment

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- ❤️ Accurate blood oxygen testing
- 👍 Comfortable to wear
- 💡 Comprehensive sleep data
- 😊 Improved app after updates
- ✅ Works as advertised

**What reviewers complain about**

- ❌ Network error nonstop
- ❌ App won't sync with Apple Health
- ❌ App requires website login
- ❌ Device stopped working
- ❌ Bluetooth connection dropping

**Reported bugs**

- Network error nonstop
- App constant network error
- App won't sync with Apple Health
- App won't open unless signed into website
- Device stopped working

**Requested features**

- Add Apple Health integration
- Add vibration alarm
- Add sleep apnea monitoring (AHI)
- Add adjustable cards feature
- Allow editing of sleep time


### K

[App page](https://appshunter.io/ios/app/k-ai-future/id6739138020)

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

**In-app purchases:** none


## Frequently asked questions

### Is SLEEPON 3 free?

SLEEPON 3 is free to download, with no in-app purchases.

### Is K free?

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

### Do SLEEPON 3 or K have ads?

Neither SLEEPON 3 nor K shows ads.

### Which is updated more often, SLEEPON 3 or K?

SLEEPON 3 ships an update every 3 weeks, and K every 3 weeks. Most recently, SLEEPON 3 was updated on October 24, 2026 and K on October 28, 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.*