# Boeing 737NG Normal Procedures vs 737 Master Caution The clearest difference is rating: 737 Master Caution at 4.4 against Boeing 737NG Normal Procedures's 3.8. 737 Master Caution also leads on in-app purchases (none vs 3) and update cadence (every 3 months vs every 14 months). Boeing 737NG Normal Procedures's advantage is ratings volume (41 vs 7) and iOS requirement (7.0 vs 13.0). On price and ads there is nothing between them. Both are free to download. Boeing 737NG Normal Procedures sells 3 in-app purchases, starting at $39.99 per month. 737 Master Caution asks for nothing beyond the download. 737 Master Caution holds the better App Store score, 4.4 against 3.8. That said, the two scores are not equally well evidenced: Boeing 737NG Normal Procedures has 41 ratings behind it against 7, so its average is the more settled of the two. Boeing 737NG Normal Procedures ships an update every 14 months, 737 Master Caution every 3 months. Both last shipped on October 24, 2026. ## The numbers | Metric | Boeing 737NG Normal Procedures | 737 Master Caution | | --- | --- | --- | | Price | Free | Free | | Rating | [3.8 (41 ratings)](https://appshunter.io/ios/app/boeing-737ng-normal-procedures/id1128325479/reviews) | **[4.4 (7 ratings)](https://appshunter.io/ios/app/737-master-caution/id6455042070/reviews)** | | Number of ratings | **41** | 7 | | Positive reviews | 12.5% of reviews | — | | In-app purchases | Yes | **No** | | Ads | No | No | | Update frequency | Every 14 months | **Every 3 months** | | Monetization | Free with in-app purchases | **Free** | | Size | 207 MB | 2 MB | | Requires iOS | **7.0** | 13.0 | | Devices | iPad | **iPhone, iPad, iPod** | | Age rating | 4+ | 4+ | | Developer | [Aviation eLearning](https://appshunter.io/developer/958126228) | [Studio BabDreams](https://appshunter.io/developer/431517875) | ## What reviewers say ### Boeing 737NG Normal Procedures [App page](https://appshunter.io/ios/app/boeing-737ng-normal-procedures/id1128325479) This app visualizes normal cockpit procedures for the Boeing 737NG, aiding in flight and simulator training. It helps users learn and remember action sequences and control locations through interactive hotspots and detailed 360° cockpit views. Full access requires a subscription. **Highlights:** Normal procedures visualization, Interactive cockpit controls, Detailed 360° cockpit view, Offline availability, Power-up to shutdown procedures **In-app purchases (3)** | Purchase | Price | Billing | | --- | --- | --- | | Full access subscription | $39.99 | per month | | Full access subscription | $49.99 | per 3 months | | Full access subscription | $89.99 | per year | ### 737 Master Caution [App page](https://appshunter.io/ios/app/737-master-caution/id6455042070) 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. **Highlights:** 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 **Features:** macOS Compatibility, Vision Pro support **In-app purchases:** none ## Frequently asked questions ### Is Boeing 737NG Normal Procedures free? Boeing 737NG Normal Procedures is free to download, with in-app purchases available. ### Is 737 Master Caution free? 737 Master Caution is free to download, with no in-app purchases. ### Which has better reviews, Boeing 737NG Normal Procedures or 737 Master Caution? 737 Master Caution is rated higher. Boeing 737NG Normal Procedures averages 3.8 out of 5 from 41 ratings, while 737 Master Caution averages 4.4 from 7 ratings. ### Do Boeing 737NG Normal Procedures or 737 Master Caution have ads? Neither Boeing 737NG Normal Procedures nor 737 Master Caution shows ads. ### Which is updated more often, Boeing 737NG Normal Procedures or 737 Master Caution? Boeing 737NG Normal Procedures ships an update every 14 months, and 737 Master Caution every 3 months. Most recently, Boeing 737NG Normal Procedures was updated on October 24, 2026 and 737 Master Caution on October 24, 2026. --- *Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*