B737 CDU vs 737 Master Caution
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
B737 CDU
This app simulates a Boeing 737 CDU, allowing users to explore its pages and enter data. It's designed for pilots preparing for flights or seeking a refresher on CDU operations. The tool offers touch screen navigation and access to FMC and ACARS pages.
- Simulates 737 CDU interface
- Explore FMC and ACARS pages
- Touch screen navigation
- Data entry for CDU
- Useful for pilot training
Read full descriptionHide full description
B737 CDU allows you to get familiar with 737 cdu and lets you explore contents of each page (A great tool for your chair flying!) It was primarily developed to help pilots preparing for operating experience flights (anyone wanting to expedite CDU set up process). However, B737 CDU can be a useful tool as a reminder for every 737 pilot out there (ex.Either you are coming back from a long vacation or simply curious what to expect to see on each page) Following features will be available: -Access to FMC and ACARS pages -Touch screen capability which allows you to move from one page to the other -Type and enter the data into CDU (no logic, just number and letters) Refer to introduction videos and screenshots to find out more about what this app can do! Disclaimer: * Buttons and inputs usually used for actual flights DO work, but some of FMC and ACARS page buttons won't work until next update. * Data being entered into CDU doesn't have any logic to it, meaning this app is simply a replica; doesn't work like actual CDU. Any inquries or comments regarding the app, please contact us at goappcs@gmail.com. Thanks for downloading. Preview video: https://www.youtube.com/watch?v=WC70v6FrlDY https://www.youtube.com/watch?v=_VB5BuvlmVQ
737 Master Caution
This app provides a comprehensive reference for over 200 warning lights and messages across B737 Classic, NG, and MAX aircraft families. It includes tools for abbreviations, FMC messages, circuit breakers, and electrical buses, aiding pilot training and aviation enthusiasts.
- References over 200 B737 warning lights and messages
- Filter by aircraft family (Classic, NG, MAX)
- Full text search for specific lights
- Personal notes and bookmarking
- Reference tools for abbreviations, FMC messages, circuit breakers, and electrical buses
Read full descriptionHide full description
This app references more than 200 warning lights and messages of the B737 Classic, NG and MAX families. You are a pilot preparing your initial 737 type rating training, or an aviation enthusiast, or a flight simulator fan. You should enjoy this app. - Warning lights are grouped by FCOM chapters. - You may filter warning lights by airplane family / generation (Classic, NG or MAX). - Full text search to find a specific light. - Add your personal notes for each light and use the app as a notebook. - Place a bookmark to specific warning lights. You will also find 4 other tools, as reference : - A complete list of abbreviations with more than 400 definitions. - Full explanation of more than 100 FMC messages. - Position of more than 500 circuit breakers, sorted by ATA codes or by panels. - List of all electrical buses and more than 500 associated services. A great tool during your initial type rating training or during a refresher later. For training purposes ONLY. Do not use in-flight. Should you spot any error or have any suggestion, feel free to contact : support@babdreams.com Enjoy.
Screenshots
Verdict
The clearest difference is price: 737 Master Caution at Free against B737 CDU's $7.99. 737 Master Caution also leads on rating (4.4 vs 2.0) and device support (3 vs 1). B737 CDU's advantage is iOS requirement (8.0 vs 13.0). On update cadence, ads and in-app purchases 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
737 Master Caution is free to download; B737 CDU costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
737 Master Caution holds the better App Store score, 4.4 against 2.0. Both are backed by a comparable volume of ratings — 2 and 7 respectively.
B737 CDU ships an update every 2 months, 737 Master Caution every 3 months. Both last shipped on October 15, 2026.
| Parameter | B737 CDU | 737 Master Caution |
|---|---|---|
| Price | $7.99 | Free — better |
| Rating | 2.0 (2 ratings) | 4.4 (7 ratings) — better |
| Positive reviews | 42.9% of reviews | — |
| Number of ratings | 2 | 7 — better |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 8.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 43 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Kun-Woo Go | Studio BabDreams |
Customer experience
B737 CDU
737 Master Caution
In-app purchases
B737 CDU
No in-app purchases
737 Master Caution
No in-app purchases
Questions
Is B737 CDU free?
Is 737 Master Caution free?
Which has better reviews, B737 CDU or 737 Master Caution?
Do B737 CDU or 737 Master Caution have ads?
Which is updated more often, B737 CDU or 737 Master Caution?
Other comparisons















