# Scan vs EcoStar III

The clearest difference is rating: Scan at 5.0 against EcoStar III's 3.3. Scan also leads on update cadence (every 3 weeks vs every 35 months) and iOS requirement (8.0 vs 15.6). On price, ratings volume, 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.

Scan holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 5 and 3 respectively.

Scan ships an update every 3 weeks, EcoStar III every 35 months. The most recent releases landed on September 23, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Scan | EcoStar III |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/scan-lock-plus/id1273746211/reviews)** | [3.3 (3 ratings)](https://appshunter.io/ios/app/ecostar-iii/id1545686967/reviews) |
| Number of ratings | **5** | 3 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 35 months |
| Monetization | Free | Free |
| Size | 41 MB | 6 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Whelen Engineering Co.](https://appshunter.io/developer/1273746210) | [Intermotive Inc](https://appshunter.io/developer/1526380552) |

## What reviewers say

### 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


### EcoStar III

[App page](https://appshunter.io/ios/app/ecostar-iii/id1545686967)

Monitor and manage your vehicle's idle reduction system. Track idle time, view real-time vehicle data, and adjust system configurations. Optimize fuel efficiency and gain insights into your vehicle's performance.

**Highlights:** Real-time idle time tracking, Idle reduction statistics calculation, Module configuration retrieval and modification, Real-time vehicle data display, Diagnostic information access

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

**In-app purchases:** none


## Frequently asked questions

### Is Scan free?

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

### Is EcoStar III free?

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

### Which has better reviews, Scan or EcoStar III?

Scan is rated higher. Scan averages 5.0 out of 5 from 5 ratings, while EcoStar III averages 3.3 from 3 ratings.

### Do Scan or EcoStar III have ads?

Neither Scan nor EcoStar III shows ads.

### Which is updated more often, Scan or EcoStar III?

Scan ships an update every 3 weeks, and EcoStar III every 35 months. Most recently, Scan was updated on September 23, 2026 and EcoStar III on October 3, 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.*