# MyCMC vs MyEngine

The clearest difference is update cadence: MyCMC at every 7 months against MyEngine's every 22 months. MyCMC also leads on iOS requirement (8.0 vs 11.0). MyEngine's advantage is device support (3 vs 1). On price, ads, in-app purchases and monetization model 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, MyEngine every 22 months. The most recent releases landed on September 21, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | MyCMC | MyEngine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/myengine/id1024732816/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 22 months |
| Monetization | Free | Free |
| Size | 7 MB | 39 MB |
| Requires iOS | **8.0** | 11.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Honeywell International, Inc.](https://appshunter.io/developer/311222963) | [Williams International Co., LLC](https://appshunter.io/developer/1024732815) |

## 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


### MyEngine

[App page](https://appshunter.io/ios/app/myengine/id1024732816)

This app facilitates the transfer of engine information files from an aircraft to a specific company. It offers two connection modes: one to acquire flight files from the aircraft and another to upload these files to the company's servers.

**Highlights:** Aircraft file acquisition, Transfer to Williams International, Two connection modes (Aircraft & WI), Automatic file transfer, Retry transfer functionality, Progress notifications

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MyCMC free?

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

### Is MyEngine free?

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

### Do MyCMC or MyEngine have ads?

Neither MyCMC nor MyEngine shows ads.

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

MyCMC ships an update every 7 months, and MyEngine every 22 months. Most recently, MyCMC was updated on September 21, 2026 and MyEngine on September 14, 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.*