# SZOS vs HaFit

The clearest difference is ads: HaFit at none against SZOS's shown. HaFit also leads on monetization model (free vs ad-supported). SZOS's advantage is rating (2.8 vs 2.5). On price, review sentiment, ratings volume and update cadence there is nothing between them.

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

SZOS holds the better App Store score, 2.8 against 2.5. Both are backed by a comparable volume of ratings — 105 and 57 respectively. Written reviews split almost evenly too, at 6% and 6% positive.

SZOS ships an update every 3 weeks, HaFit fortnightly. The most recent releases landed on September 12, 2026 and September 1, 2026 respectively.

## The numbers

| Metric | SZOS | HaFit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.8 (105 ratings)](https://appshunter.io/ios/app/szos/id1543848875/reviews)** | [2.5 (57 ratings)](https://appshunter.io/ios/app/hafit/id1567855547/reviews) |
| Number of ratings | **105** | 57 |
| Positive reviews | 5.6% of reviews | 5.6% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Ad-supported | **Free** |
| Size | 70 MB | 55 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [晟 谷](https://appshunter.io/developer/1543671031) | [Shenzhen Water World Software Technology Co., Ltd](https://appshunter.io/developer/1753909625) |

## What reviewers say

### 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


### HaFit

[App page](https://appshunter.io/ios/app/hafit/id1567855547)

Track your fitness activities, monitor sleep patterns, and receive personalized health insights. Connect with your wearable device for convenient notifications and settings. Visualize your progress with detailed charts and sync data with Apple Health.

**Highlights:** Real-time activity tracking, Sleep data analysis, Wearable device integration, Personalized notifications, Activity visualization, Apple Health synchronization

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SZOS free?

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

### Is HaFit free?

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

### Which has better reviews, SZOS or HaFit?

SZOS is rated higher. SZOS averages 2.8 out of 5 from 105 ratings, while HaFit averages 2.5 from 57 ratings.

### Do SZOS or HaFit have ads?

SZOS shows ads; HaFit does not.

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

SZOS ships an update every 3 weeks, and HaFit fortnightly. Most recently, SZOS was updated on September 12, 2026 and HaFit on September 1, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*