MyCMC vs MyEngine
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MyCMC
Access ACMS and FHDB databases from the Honeywell Primus Apex Integrated Avionics Suite. This tool requires login to the Connected Flight Deck System.
- ACMS database retrieval
- FHDB database retrieval
- Honeywell Primus Apex integration
- Connected Flight Deck System login
- Avionics data access
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Honeywell's MyCMC app is a tool for retrieving ACMS and FHDB databases from the Honeywell Primus Apex Integrated Avionics Suite when logged into the Connected Flight Deck System.
MyEngine
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.
- Aircraft file acquisition
- Transfer to Williams International
- Two connection modes (Aircraft & WI)
- Automatic file transfer
- Retry transfer functionality
- Progress notifications
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Overview Williams International - MyEngine - Information File Transfer This application facilitates the transfer of Engine Information (e-info) files from an Aircraft to Williams International. The MyEngine application has 2 Connection Modes, Aircraft and WI. In Aircraft Connection Mode the flight files on the Aircraft are acquired by the iPad. In WI Connection Mode, the e-info files are uploaded to Williams International. Acquiring Aircraft Files In order to acquire Aircraft flight files, change to Aircraft Connection Mode. Use the [ Make a Connection ], [ Connect to Aircraft ] or [ Connect to Internet ] button on the home page to access the iPad Settings (Wi-Fi) and select the appropriate Aircraft network. Once the Aircraft Wi-Fi setting is selected, return to the MyEngine home page and verify Aircraft availability via the [ Wi-Fi ] display. Aircraft file acquisition will begin automatically. Aircraft files can be re-acquired, or a cancelled acquisition can be restarted, by using the [ Retry Transfer ] button. Notifications will provide file acquisition progress or error messages. Transferring Files to Williams International After Aircraft flight files have been acquired, transfer to Williams International is available. Change to WI Connection Mode (via Internet) by using the [ Connect to Internet ] or [ Make a Connection ] button on the home page to access the iPad Settings (Wi-Fi) and select the appropriate Internet network. Once the Williams Connect (Internet) Wi-Fi setting is selected, return to the MyEngine home page and verify availability via the [ Wi-Fi ] display. File transfer to Williams International will begin automatically. Files can be re-sent, or a cancelled transfer can be restarted, by using the [ Retry Transfer ] button. Notifications will provide file transfer progress or error messages.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | MyCMC | MyEngine |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | — | 3 — better |
| Update frequency | Every 7 months — better | Every 22 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 8.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 7 MB | 39 MB |
| Age rating | 4+ | 4+ |
| Developer | Honeywell International, Inc. | Williams International Co., LLC |
Customer experience
MyCMC
MyEngine
In-app purchases
MyCMC
No in-app purchases
MyEngine
No in-app purchases






