# Q vs Trailer Sentry

The clearest difference is update cadence: Trailer Sentry at every 5 months against Q's every 20 months. Q's advantage is iOS requirement (10.0 vs 12.0). 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.

Q ships an update every 20 months, Trailer Sentry every 5 months. The most recent releases landed on October 24, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Q | Trailer Sentry |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/q-files/id1041057868/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 5 months** |
| Monetization | Free | — |
| Size | 54 MB | 2 MB |
| Requires iOS | **10.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [David Guildford](https://appshunter.io/developer/1770445601) | [7PSolutions, LLC](https://appshunter.io/developer/977726086) |

## What reviewers say

### Q

[App page](https://appshunter.io/ios/app/q-files/id1041057868)

This app allows Quantum Tuning dealers to quickly verify vehicle eligibility and estimate performance gains using a vehicle's model or registration number. It connects dealers to a global remapping service with extensive vehicle coverage.

**Highlights:** Vehicle eligibility check, Estimated performance figures, Vehicle model lookup, Vehicle registration lookup, Global dealer network access

**Features:** macOS Compatibility

**In-app purchases:** none


### Trailer Sentry

[App page](https://appshunter.io/ios/app/trailer-sentry/id1221831418)

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

**In-app purchases:** none


## Frequently asked questions

### Is Q free?

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

### Is Trailer Sentry free?

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

### Do Q or Trailer Sentry have ads?

Neither Q nor Trailer Sentry shows ads.

### Which is updated more often, Q or Trailer Sentry?

Q ships an update every 20 months, and Trailer Sentry every 5 months. Most recently, Q was updated on October 24, 2026 and Trailer Sentry on October 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*