# Trailer Safety Control vs OBD Tally

The clearest difference is update cadence: OBD Tally at every 5 days against Trailer Safety Control's every 18 months. Trailer Safety Control's advantage is iOS requirement (14.0 vs 26.4). 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, OBD Tally every 5 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Trailer Safety Control | OBD Tally |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 5 days** |
| Size | 50 MB | 10 MB |
| Requires iOS | **14.0** | 26.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ROBERT BOSCH (AUSTRALIA) PROPRIETARY LIMITED](https://appshunter.io/developer/1714209979) | [THOMAS L JANUS](https://appshunter.io/developer/1841200408) |

## 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


### OBD Tally

[App page](https://appshunter.io/ios/app/obd-tally/id6761873600)

**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 OBD Tally free?

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

### Do Trailer Safety Control or OBD Tally have ads?

Neither Trailer Safety Control nor OBD Tally shows ads.

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

Trailer Safety Control ships an update every 18 months, and OBD Tally every 5 days. Most recently, Trailer Safety Control was updated on November 3, 2026 and OBD Tally on October 31, 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.*