# Trailer Safety Control vs ShowerStar

The clearest difference is update cadence: ShowerStar at monthly against Trailer Safety Control's every 18 months. Trailer Safety Control's advantage is iOS requirement (14.0 vs 16.0). 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.

Trailer Safety Control ships an update every 18 months, ShowerStar monthly. The most recent releases landed on November 7, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Trailer Safety Control | ShowerStar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Monthly** |
| Size | 50 MB | 48 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ROBERT BOSCH (AUSTRALIA) PROPRIETARY LIMITED](https://appshunter.io/developer/1714209979) | [TouchGrid](https://appshunter.io/developer/1780508994) |

## What reviewers say

### Trailer Safety Control

[App page](https://appshunter.io/ios/app/trailer-safety-control/id6470779977)

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

**In-app purchases:** none


### ShowerStar

[App page](https://appshunter.io/ios/app/showerstar/id6738381476)

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

**In-app purchases:** none


## Frequently asked questions

### Is Trailer Safety Control free?

Trailer Safety Control is free to download, with no in-app purchases.

### Is ShowerStar free?

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

### Do Trailer Safety Control or ShowerStar have ads?

Neither Trailer Safety Control nor ShowerStar shows ads.

### Which is updated more often, Trailer Safety Control or ShowerStar?

Trailer Safety Control ships an update every 18 months, and ShowerStar monthly. Most recently, Trailer Safety Control was updated on November 7, 2026 and ShowerStar on November 4, 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.*