# HAYLOU vs SZOS

The clearest difference is ads: HAYLOU at none against SZOS's shown. HAYLOU also leads on update cadence (every 3 days vs every 3 weeks) and monetization model (free vs ad-supported). On price, rating, review sentiment and ratings volume there is nothing between them.

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

On the App Store both sit at effectively the same score — 2.9 for HAYLOU against 2.8 for SZOS. Both are backed by a comparable volume of ratings — 74 and 105 respectively. Written reviews are what separate them: 11% of HAYLOU's written reviews are positive against 5% of SZOS's.

HAYLOU ships an update every 3 days, SZOS every 3 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | HAYLOU | SZOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.9 (74 ratings)](https://appshunter.io/ios/app/haylou/id1486710129/reviews)** | [2.8 (105 ratings)](https://appshunter.io/ios/app/szos/id1543848875/reviews) |
| Number of ratings | 74 | **105** |
| Positive reviews | **11.0% of reviews** | 5.3% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Every 3 weeks |
| Monetization | **Free** | Ad-supported |
| Size | 80 MB | 70 MB |
| Requires iOS | **9.0** | 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

[App page](https://appshunter.io/ios/app/haylou/id1486710129)

Track your daily steps, calories burned, and exercise duration with detailed analysis. Monitor your sleep patterns, set fitness goals, and receive intelligent reminders. Manage your TWS headset settings and enjoy a healthier lifestyle.

**Highlights:** Accurate exercise records, Detailed sleep analysis, Pedometer with calorie and distance tracking, GPS route recording, Sleep stage monitoring, Goal setting, Intelligent silent alarm

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

**In-app purchases:** none

**What reviewers like**

- 👍 Good sound quality
- ⏱️ Long battery life
- 🎯 Accurate activity tracking
- 💪 Comfortable fit
- 📊 Quality reports available

**What reviewers complain about**

- 🐛 Frequent app crashes
- 🔌 Poor connectivity issues
- ❌ Registration/verification code failures
- ⚠️ Data synchronization problems
- 🌐 Abandoned/outdated app

**Reported bugs**

- Verification code not being sent
- Registration fails with error messages
- App crashes on startup
- App crashes when accessing heart rate settings
- Device not detected/recognized

**Requested features**

- Add more watch faces
- Custom watch face support
- Weather synchronization settings
- Celsius/Fahrenheit toggle
- Russian language support


### 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

**What reviewers like**

- 👍 Watch looks good
- 👍 Watch features were great

**What reviewers complain about**

- 🐛 App not working
- 🐛 App crashes
- 🐛 App freezes
- 🐛 White screen of death
- 🐛 App doesn't open

**Reported bugs**

- App needs update and fix
- App has white screen of death
- App hasn't been updated in a year
- App will not open
- App no longer functions or is supported

**Requested features**

- Update and fix the app
- App needs background app refresh
- Find phone feature
- Weather stay updated
- Celsius/Fahrenheit selector


## Frequently asked questions

### Is HAYLOU free?

HAYLOU 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 or SZOS?

HAYLOU is rated higher. HAYLOU averages 2.9 out of 5 from 74 ratings, while SZOS averages 2.8 from 105 ratings.

### Do HAYLOU or SZOS have ads?

SZOS shows ads; HAYLOU does not.

### Which is updated more often, HAYLOU or SZOS?

HAYLOU ships an update every 3 days, and SZOS every 3 weeks. Most recently, HAYLOU was updated on November 3, 2026 and SZOS on November 3, 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.*