# 行车SOS vs CARSFORM

The clearest difference is update cadence: 行车SOS at fortnightly against CARSFORM's every 16 months. 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.

行车SOS ships an update fortnightly, CARSFORM every 16 months. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 行车SOS | CARSFORM |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 16 months |
| Size | 63 MB | 9 MB |
| Requires iOS | **9.0** | 10.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Guangdong Ecarservice Ltd](https://appshunter.io/developer/490592913) | [胜 邓](https://appshunter.io/developer/1368398791) |

## What reviewers say

### 行车SOS

[App page](https://appshunter.io/ios/app/sos/id1229586535)

**Features:** macOS Compatibility

**In-app purchases:** none


### CARSFORM

[App page](https://appshunter.io/ios/app/carsform/id1625522413)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 行车SOS free?

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

### Is CARSFORM free?

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

### Do 行车SOS or CARSFORM have ads?

Neither 行车SOS nor CARSFORM shows ads.

### Which is updated more often, 行车SOS or CARSFORM?

行车SOS ships an update fortnightly, and CARSFORM every 16 months. Most recently, 行车SOS was updated on October 26, 2026 and CARSFORM on October 27, 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.*