# Haylou Fun vs SZOS

The clearest difference is ads: Haylou Fun at none against SZOS's shown. Haylou Fun also leads on rating (3.3 vs 2.8) and monetization model (free vs ad-supported). SZOS's advantage is ratings volume (105 vs 20) and iOS requirement (13.0 vs 15.0). On price, update cadence, in-app purchases and device support there is nothing between them.

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

Haylou Fun holds the better App Store score, 3.3 against 2.8. That said, the two scores are not equally well evidenced: SZOS has 105 ratings behind it against 20, so its average is the more settled of the two. Written reviews point the same way: 14% of Haylou Fun's written reviews are positive against 5% of SZOS's.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 23, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Haylou Fun | SZOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (20 ratings)](https://appshunter.io/ios/app/haylou-fun/id1534983357/reviews)** | [2.8 (105 ratings)](https://appshunter.io/ios/app/szos/id1543848875/reviews) |
| Number of ratings | 20 | **105** |
| Positive reviews | **13.7% of reviews** | 5.3% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | **Free** | Ad-supported |
| Size | 293 MB | 70 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dongguan Liesheng Electronic Co.,Ltd.](https://appshunter.io/developer/1479377043) | [晟 谷](https://appshunter.io/developer/1543671031) |

## What reviewers say

### Haylou Fun

[App page](https://appshunter.io/ios/app/haylou-fun/id1534983357)

This app connects to smart devices to manage your health and exercise data. It tracks various health metrics, records over 100 sports modes, and allows for device management and customization with rich watch faces. It also offers sleep monitoring and analysis, with data sharing capabilities.

**Highlights:** Record health data (steps, heart rate, sleep, etc.), 100+ sports modes with voice broadcast, Device management and settings, Customizable watch faces, Night sleep monitoring and analysis, Data sharing with Apple Health

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

**In-app purchases:** none

**What reviewers like**

- 👍 Good for beginners
- 💡 Customizable watch faces
- 🚀 Decent battery life

**What reviewers complain about**

- 🐛 Notifications not working
- 🐛 Connectivity issues
- 🔒 Lack of security features
- 💤 Limited watch face options

**Reported bugs**

- Notifications not appearing on watch
- Frequent disconnections between watch and app
- App crashes and freezes
- Inaccurate data sync and recording

**Requested features**

- Add more watch face options
- Improve notification functionality
- Enhance connectivity and sync
- Introduce security and privacy features


### SZOS

[App page](https://appshunter.io/ios/app/szos/id1543848875)

This app syncs with a smart watch to track your daily activity, including steps, heart rate, and sleep patterns. It provides insights into your health and fitness metrics.

**Highlights:** Step tracking, Heart rate monitoring, Sleep analysis, Syncs with smart watch, Activity mode

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

**In-app purchases:** none


## Frequently asked questions

### Is Haylou Fun free?

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

### Is SZOS free?

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

### Which has better reviews, Haylou Fun or SZOS?

Haylou Fun is rated higher. Haylou Fun averages 3.3 out of 5 from 20 ratings, while SZOS averages 2.8 from 105 ratings.

### Do Haylou Fun or SZOS have ads?

SZOS shows ads; Haylou Fun does not.

### Which is updated more often, Haylou Fun or SZOS?

Haylou Fun ships an update every 3 weeks, and SZOS every 3 weeks. Most recently, Haylou Fun was updated on October 23, 2026 and SZOS on October 22, 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.*