# SZOS vs RV Fit

The clearest difference is ads: RV Fit at none against SZOS's shown. RV Fit also leads on update cadence (every 5 days vs every 3 weeks) and rating (3.0 vs 2.8). SZOS's advantage is ratings volume (105 vs 2). On price, review sentiment, 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.

RV Fit holds the better App Store score, 3.0 against 2.8. That said, the two scores are not equally well evidenced: SZOS has 105 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 5% of SZOS's written reviews are positive against 0% of RV Fit's, so the app with the better star average is not the one people write more warmly about.

SZOS ships an update every 3 weeks, RV Fit every 5 days. The most recent releases landed on October 18, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | SZOS | RV Fit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.8 (105 ratings)](https://appshunter.io/ios/app/szos/id1543848875/reviews) | **[3.0 (2 ratings)](https://appshunter.io/ios/app/rv-fit/id1658458230/reviews)** |
| Number of ratings | **105** | 2 |
| Positive reviews | **5.3% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | Ad-supported | **Free** |
| Size | 70 MB | 41 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [晟 谷](https://appshunter.io/developer/1543671031) | [Shenzhen Dinghefeng Technology Co., Ltd.](https://appshunter.io/developer/1698935717) |

## 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


### RV Fit

[App page](https://appshunter.io/ios/app/rv-fit/id1658458230)

This smartwatch application provides real-time weather updates and simplifies water intake tracking. It syncs with smart bands to manage daily steps and sleep patterns, offering notifications for calls and messages, along with customizable watch faces.

**Highlights:** Real-time weather updates, Water intake tracking, Daily step and sleep management, Call and message notifications, Customizable watch faces, Apple HealthKit integration

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SZOS free?

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

### Is RV Fit free?

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

### Which has better reviews, SZOS or RV Fit?

RV Fit is rated higher. SZOS averages 2.8 out of 5 from 105 ratings, while RV Fit averages 3.0 from 2 ratings.

### Do SZOS or RV Fit have ads?

SZOS shows ads; RV Fit does not.

### Which is updated more often, SZOS or RV Fit?

SZOS ships an update every 3 weeks, and RV Fit every 5 days. Most recently, SZOS was updated on October 18, 2026 and RV Fit on October 7, 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.*