# Trailer Sentry vs Lockii

The clearest difference is update cadence: Lockii at every 3 weeks against Trailer Sentry's every 5 months. Trailer Sentry's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Trailer Sentry ships an update every 5 months, Lockii every 3 weeks. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Trailer Sentry | Lockii |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Size | 2 MB | 75 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [7PSolutions, LLC](https://appshunter.io/developer/977726086) | [Bodhi Hawken](https://appshunter.io/developer/1630519726) |

## What reviewers say

### Trailer Sentry

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

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

**In-app purchases:** none


### Lockii

[App page](https://appshunter.io/ios/app/lockii/id6760279723)

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

**In-app purchases:** none


## Frequently asked questions

### Is Trailer Sentry free?

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

### Is Lockii free?

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

### Do Trailer Sentry or Lockii have ads?

Neither Trailer Sentry nor Lockii shows ads.

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

Trailer Sentry ships an update every 5 months, and Lockii every 3 weeks. Most recently, Trailer Sentry was updated on October 26, 2026 and Lockii on October 24, 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.*