# 737 Master Caution — for Classic, NG and MAX series > B737 warning lights, messages, and aircraft system reference for training. (iPhone/iPad app by Studio BabDreams.) - Source: https://appshunter.io/ios/app/737-master-caution/id6455042070 (this page in markdown: same URL + `.md`) - Developer: [Studio BabDreams](https://appshunter.io/developer/431517875) - Category: Education - Price: Free - Rating: 4.40/5 from 7 App Store ratings - Age rating: 4+ - Requires: iOS 13.0 · 2 MB - Languages: American English - Released: 2023-08-02 - Data updated: 2026-08-29 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/737-master-caution/id6455042070/reviews.md ## What is 737 Master Caution? 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. ## Key features - 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 ## Frequently asked questions about 737 Master Caution ### What aircraft families does 737 Master Caution cover? 737 Master Caution covers the B737 Classic, NG, and MAX aircraft families, referencing over 200 warning lights and messages specific to these generations. ### Can I add my own notes in 737 Master Caution? Yes, you can add personal notes for each warning light and use the app as a digital notebook to enhance your learning and reference experience. ### Does 737 Master Caution have ads? No, 737 Master Caution is ad-free, providing an uninterrupted learning experience for its users. ### What other reference tools are included in 737 Master Caution? In addition to warning lights, 737 Master Caution includes a list of over 400 abbreviations, explanations for over 100 FMC messages, circuit breaker positions, and a list of electrical buses with associated services. ### Is 737 Master Caution suitable for actual flight use? No, 737 Master Caution is strictly for training purposes only and should not be used for in-flight operations. ### How often is 737 Master Caution updated? The latest version, 1.4.1, was released on 2025-07-06, indicating recent development and support for the application. ### What is the user sentiment for 737 Master Caution based on ratings? Based on the available data, 737 Master Caution has a rating of 3.7 stars from 3 ratings, suggesting a generally positive but mixed user reception. ### What devices is 737 Master Caution available on? 737 Master Caution is available on iPhone, iPad, and iPod devices, making it accessible to a wide range of Apple users. ## Version history (last 5 releases) ### 1.4.1 — 2025-07-06 - Fixes minor issues ### 1.4 — 2025-03-25 New menu option on top right corner with : - List of all electrical busses and more than 500 associated services. ### 1.3 — 2025-02-20 New menu on top right corner with : - Full explanation of more than 100 FMC messages. - Position of more than 500 circuit breakers. ### 1.2.1 — 2024-06-10 - List of warning lights : added a personal notes filter - Warning light detail : added editor note and model availability on some lights - Fixed minor issues ### 1.2 — 2024-03-12 - List of warning lights : added a personal notes filter - Warning light detail : added editor note and model availability on some lights - Fixed minor issues ## Apps similar to 737 Master Caution | App | Rating | Price | Category | | --- | --- | --- | --- | | [B737 MRG](https://appshunter.io/ios/app/b737-mrg/id481163421) | 4.9 (291) | Free | Education | | [737 Handbook](https://appshunter.io/ios/app/737-handbook/id1482597031) | 4.8 (245) | Free | Education | | [iBOEING Type Rating Prep](https://appshunter.io/ios/app/iboeing-type-rating-prep/id1499571547) | 3.4 (15) | Free | Education | | [B737 Performance Handbook](https://appshunter.io/ios/app/b737-performance-handbook/id871314271) | 5.0 (9) | Free | Education | | [iBOEING B-737 Aircraft Apps](https://appshunter.io/ios/app/iboeing-b-737-aircraft-apps/id1530749830) | 5.0 (2) | Free | Education | | [Boeing 737 FMC CDU](https://appshunter.io/ios/app/boeing-737-fmc-cdu/id6503940647) | 1.0 (4) | Free | Education | ## More apps by Studio BabDreams - [Tatouvu](https://appshunter.io/ios/app/tatouvu/id431517872) - [Morocco Press - مغرب بريس](https://appshunter.io/ios/app/morocco-press/id442007590) - [Morocco Funny](https://appshunter.io/ios/app/morocco-funny/id446092485) - [Tunisie Presse - تونس بريس](https://appshunter.io/ios/app/tunisie-presse/id495144399) - [Algérie Presse - جزائر بريس](https://appshunter.io/ios/app/algerie-presse/id495145134) - [Egypt Press - مصر بريس](https://appshunter.io/ios/app/egypt-press/id514086319) All apps by Studio BabDreams: https://appshunter.io/developer/431517875 ## Related topics [737 master caution](https://appshunter.io/ios/topics/737-master-caution) · [737](https://appshunter.io/ios/topics/737) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-29.*