# DCTU vs Acron A330 ETHOS

The clearest difference is device support: DCTU at 3 against Acron A330 ETHOS's 1. DCTU also leads on iOS requirement (12.4 vs 15.6). On price, update cadence, 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.

DCTU ships an update every 5 months, Acron A330 ETHOS every 3 months. The most recent releases landed on October 15, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | DCTU | Acron A330 ETHOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/dctu/id1590757019/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 55 MB | 26 MB |
| Requires iOS | **12.4** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pratt & Whitney Canada Cie](https://appshunter.io/developer/1468490552) | [Aerosim](https://appshunter.io/developer/491766443) |

## What reviewers say

### DCTU

[App page](https://appshunter.io/ios/app/dctu/id1590757019)

This application facilitates communication with specific engine hardware for maintenance tasks. It allows users to view and modify engine parameters, retrieve diagnostic data, and manage engine module information. The tool supports real-time data collection and offline data entry.

**Highlights:** View/Change EEC and DCTU parameters, Retrieve Events, Exceedances & Faults (EEF), Monitor DCTU health status, Perform live data diagnostics, Scan barcodes for module changes, Generate offline LRU/Engine Module data files

**Features:** macOS Compatibility

**In-app purchases:** none


### Acron A330 ETHOS

[App page](https://appshunter.io/ios/app/acron-a330-ethos/id6762300747)

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

**In-app purchases:** none


## Frequently asked questions

### Is DCTU free?

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

### Is Acron A330 ETHOS free?

Acron A330 ETHOS is free to download, with no in-app purchases.

### Do DCTU or Acron A330 ETHOS have ads?

Neither DCTU nor Acron A330 ETHOS shows ads.

### Which is updated more often, DCTU or Acron A330 ETHOS?

DCTU ships an update every 5 months, and Acron A330 ETHOS every 3 months. Most recently, DCTU was updated on October 15, 2026 and Acron A330 ETHOS on October 25, 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.*