# WreckMaster vs Scan

The clearest difference is in-app purchases: Scan at none against WreckMaster's 1. Scan also leads on update cadence (every 3 weeks vs every 24 months) and iOS requirement (8.0 vs 15.0). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. WreckMaster sells 1 one-off in-app purchase. Scan asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for WreckMaster against 5.0 for Scan. Both are backed by a comparable volume of ratings — 3 and 5 respectively.

WreckMaster ships an update every 24 months, Scan every 3 weeks. The most recent releases landed on September 28, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | WreckMaster | Scan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/wreckmaster/id1114705794/reviews) | [5.0 (5 ratings)](https://appshunter.io/ios/app/scan-lock-plus/id1273746211/reviews) |
| Number of ratings | 3 | **5** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 56 MB | 41 MB |
| Requires iOS | 15.0 | **8.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [WreckMaster](https://appshunter.io/developer/1114705793) | [Whelen Engineering Co.](https://appshunter.io/developer/1273746210) |

## What reviewers say

### WreckMaster

[App page](https://appshunter.io/ios/app/wreckmaster/id1114705794)

This app helps towing and recovery operators calculate resistance and load forces. It assists with calculations for surface and gradient resistance, and includes features for anchorability, weight transfer, and fleet truck management with its in-app purchase.

**Highlights:** Resistance and load force calculations, Surface and gradient resistance calculation, Anchorability and weight transfer calculation, Fleet truck information saving, Towing and lift capacity at fingertips

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Can I Tow it? | $19.99 | one-time |


### Scan

[App page](https://appshunter.io/ios/app/scan-lock-plus/id1273746211)

Easily manage Whelen flash patterns for compatible lightheads using your phone. Browse, test, and assign patterns wirelessly via Bluetooth with a required programmer.

**Highlights:** Browse and assign flash patterns, Test patterns up to 20 seconds, Access steady pattern option, Bluetooth connectivity, Supports compatible Whelen lightheads

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WreckMaster free?

WreckMaster is free to download, with in-app purchases available.

### Is Scan free?

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

### Which has better reviews, WreckMaster or Scan?

WreckMaster and Scan are both rated 5.0 out of 5 on the App Store, from 3 and 5 ratings respectively.

### Do WreckMaster or Scan have ads?

Neither WreckMaster nor Scan shows ads.

### Which is updated more often, WreckMaster or Scan?

WreckMaster ships an update every 24 months, and Scan every 3 weeks. Most recently, WreckMaster was updated on September 28, 2026 and Scan on September 23, 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.*