# Frontier X vs SLEEPON 3

The clearest difference is review sentiment: Frontier X at 82% against SLEEPON 3's 35%. Frontier X also leads on rating (4.6 vs 2.0) and ratings volume (318 vs 40). SLEEPON 3's advantage is in-app purchases (none vs 2) and iOS requirement (13.0 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Frontier X sells 2 in-app purchases, starting at $14.99 per month. SLEEPON 3 asks for nothing beyond the download.

Frontier X holds the better App Store score, 4.6 against 2.0. That said, the two scores are not equally well evidenced: Frontier X has 318 ratings behind it against 40, so its average is the more settled of the two. Written reviews point the same way: 82% of Frontier X's written reviews are positive against 35% of SLEEPON 3's.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Frontier X | SLEEPON 3 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (318 ratings)](https://appshunter.io/ios/app/frontier-x/id1483444499/reviews)** | [2.0 (40 ratings)](https://appshunter.io/ios/app/sleepon-3/id6497714109/reviews) |
| Number of ratings | **318** | 40 |
| Positive reviews | **81.8% of reviews** | 35.2% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 569 MB | 67 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Fourthfrontier](https://appshunter.io/developer/1331846764) | [Shenzhen Sleepon Technology Co., Ltd.](https://appshunter.io/developer/1385995936) |

## What reviewers say

### Frontier X

[App page](https://appshunter.io/ios/app/frontier-x/id1483444499)

Track your heart health and exercise performance with a smart chest strap monitor. Gain detailed insights into heart rate, rhythms, and training load. Receive personalized feedback and alerts to optimize your workouts and understand your body better.

**Highlights:** Heart Health Monitoring, Real-time Heart Rate & HRV, Breathing Rate & Strain Tracking, Activity Recording (24hrs), Personalized Vibration Alerts, AI-enabled Training Insights, Metabolic Profile Analytics (Premium)

**Features:** Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $14.99 | per month |
| Yearly | $119.99 | per year |

**What reviewers like**

- 🚀 Amazing device
- 👍 Great HR data and insight
- 👍 Helpful in gaining more data
- 👍 Fantastic concept with excellent execution
- 👍 Loads of useful information

**What reviewers complain about**

- 🐛 Worse and worse as time goes by
- 🐛 ECG doesn't work
- 🐛 Chest strap issues, device keeps popping out
- 🐛 Paywalled functionality
- 🐛 Syncing issues, device keeps disconnecting

**Reported bugs**

- ECG stopped working
- Inaccurate breathing rate and other metrics
- Inability to edit activity details for indoor workouts
- Syncing issues with Garmin devices after firmware updates

**Requested features**

- Add interval markers
- Improve integration with Apple Fitness/Fitness+
- Add support for ANT+
- Improve compatibility with other fitness apps and devices
- Add more customization options for workouts


### 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


## Frequently asked questions

### Is Frontier X free?

Frontier X is free to download, with in-app purchases available.

### Is SLEEPON 3 free?

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

### Which has better reviews, Frontier X or SLEEPON 3?

Frontier X is rated higher. Frontier X averages 4.6 out of 5 from 318 ratings, while SLEEPON 3 averages 2.0 from 40 ratings.

### Do Frontier X or SLEEPON 3 have ads?

Neither Frontier X nor SLEEPON 3 shows ads.

### Which is updated more often, Frontier X or SLEEPON 3?

Frontier X ships an update every 3 weeks, and SLEEPON 3 every 3 weeks. Most recently, Frontier X was updated on October 25, 2026 and SLEEPON 3 on October 24, 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.*