# USim OS vs SmartCar Tracker

The clearest difference is update cadence: USim OS at weekly against SmartCar Tracker's every 10 months. USim OS also leads on iOS requirement (13.0 vs 15.0). On price, ads, 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.

USim OS ships an update weekly, SmartCar Tracker every 10 months. The most recent releases landed on September 16, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | USim OS | SmartCar Tracker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 10 months |
| Size | 77 MB | 32 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Ruiyu Chen](https://appshunter.io/developer/1762343435) | [FINDME LTD](https://appshunter.io/developer/1805779271) |

## What reviewers say

### USim OS

[App page](https://appshunter.io/ios/app/usim-os/id6740407423)

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

**In-app purchases:** none


### SmartCar Tracker

[App page](https://appshunter.io/ios/app/smartcar-tracker/id6744053696)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is USim OS free?

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

### Is SmartCar Tracker free?

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

### Do USim OS or SmartCar Tracker have ads?

Neither USim OS nor SmartCar Tracker shows ads.

### Which is updated more often, USim OS or SmartCar Tracker?

USim OS ships an update weekly, and SmartCar Tracker every 10 months. Most recently, USim OS was updated on September 16, 2026 and SmartCar Tracker on September 9, 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.*