# MyCMC vs DCTU

The clearest difference is device support: DCTU at 3 against MyCMC's 1. MyCMC's advantage is iOS requirement (8.0 vs 12.4). 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.

MyCMC ships an update every 7 months, DCTU every 5 months. The most recent releases landed on September 21, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | MyCMC | DCTU |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/dctu/id1590757019/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 5 months** |
| Monetization | Free | Free |
| Size | 7 MB | 55 MB |
| Requires iOS | **8.0** | 12.4 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Honeywell International, Inc.](https://appshunter.io/developer/311222963) | [Pratt & Whitney Canada Cie](https://appshunter.io/developer/1468490552) |

## What reviewers say

### MyCMC

[App page](https://appshunter.io/ios/app/mycmc/id700690011)

Access ACMS and FHDB databases from the Honeywell Primus Apex Integrated Avionics Suite. This tool requires login to the Connected Flight Deck System.

**Highlights:** ACMS database retrieval, FHDB database retrieval, Honeywell Primus Apex integration, Connected Flight Deck System login, Avionics data access

**In-app purchases:** none


### 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


## Frequently asked questions

### Is MyCMC free?

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

### Is DCTU free?

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

### Do MyCMC or DCTU have ads?

Neither MyCMC nor DCTU shows ads.

### Which is updated more often, MyCMC or DCTU?

MyCMC ships an update every 7 months, and DCTU every 5 months. Most recently, MyCMC was updated on September 21, 2026 and DCTU on September 29, 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.*