FMS 737 vs OffBlock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FMS 737
This application provides a free-play simulation of the B737 Flight Management System. It's designed for training centers to help pilots familiarize themselves with the system before simulator sessions, offering an easy-to-use interface and comprehensive functions.
- B737 FMS simulation
- Free play mode
- Accurate simulation
- Easy-to-use interface
- Complete set of functions
- Pilot familiarization tool
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This app requires a user account provided by your Eca Faros representative. B737 Flight Management System Trainer is ECA Group solution to training centers’ need for B737 FMS familiarization tools. It offers a free play and accurate simulation, bringing a great added value before entering into simulators expensive sessions. Pilots’ transition to B737 complex flight management system is smoothly performed thanks to an easy-to-use interface and a complete set of available functions.
OffBlock
This app combines a smart pilot logbook with a flight crew organizer. It offers features like automated roster imports, flight logging, and crew communication tools. Share your aviation life and manage your professional schedule efficiently.
- Smart flight logging
- Automated roster imports
- Integrated aircraft management
- Calendar with timeline
- Crew communication tools
- Roster sharing
- Data export in official formats
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The features you love combined in one app: Pilot Logbook – Created to do the work, with no work for you. • Smart flight logging, optimized for speed • Integrated aircraft management • Digital signature • Precise night time calculation • Powerful statistics, also for type- and class ratings • Data export, PDF reports in official formats (EASA, FAA) • Certificate manager • Extensive airport database, location info & aviation weather • Easy data import from third party apps Flight Crew App – Keep up. Be organized. Stay connected. • Calendar with timeline • Automated roster imports (“Live Updates”) • Push notifications & highlighting of roster changes • Calendar export to your private calendars • Crewlists for upcoming und past flights • Common events • Messaging (private chats & groups) • Flight map – ready to share on social media Roster Sharing – Share your aviation life. With privacy built in. • Connect with friends & colleagues • Check their rosters • Find common off days • Extra: OffBlock Family App for your non-flying family and friends The roster evaluation software „easy dutyplan“ is directly integrated into OffBlock - save money even faster and easier on your tax return! Supported roster systems: • AIMS eCrew • eCrew OCR • CBL WinOps • CrewConnex • CrewWebPlus APM • Jeppesen Crew Access • Leon • Lufthansa Group Open API • NetLine/CrewLink, Crew IDP • Planeación • RAIDO • Sabre CWP • SGT • SkedPlus+ • TOPS FREE 60 day trial on signup.
Screenshots
Verdict
The clearest difference is rating: OffBlock at 4.8 against FMS 737's 3.0. OffBlock also leads on update cadence (every 2 months vs every 10 months) and ratings volume (104 vs 4). FMS 737's advantage is in-app purchases (none vs 4). On price, review sentiment and ads 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. OffBlock sells 4 in-app purchases, starting at $2.99 per month. FMS 737 asks for nothing beyond the download.
OffBlock holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: OffBlock has 104 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 50% of FMS 737's written reviews are positive against 48% of OffBlock's, so the app with the better star average is not the one people write more warmly about.
FMS 737 ships an update every 10 months, OffBlock every 2 months. Both last shipped on November 2, 2026.
| Parameter | FMS 737 | OffBlock |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (4 ratings) | 4.8 (104 ratings) — better |
| Positive reviews | 50.0% of reviews — better | 48.3% of reviews |
| Number of ratings | 4 | 104 — better |
| Update frequency | Every 10 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 28 MB | 275 MB |
| Age rating | 4+ | 4+ |
| Developer | ECA Faros | OffBlock GmbH |
Customer experience
FMS 737
OffBlock
Bugs and requests
FMS 737
Not enough reviews yet to summarise bugs or requests.
OffBlock
Reported bugs
14 issues- Roster import not working
- App is unusable
- Roster autodownload and manual download doesn't work
- Stby duties are not visible
- Data lost
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- App crashes
- Dates bugging
- Calendar export not working
- Synchronization issues with Offblock-Family
- Import roster stuck at 0%
- Total flight hours not visible without payment
- Statistics data lost after forced migration
- All old data gone after update
- Remark option not reintroduced
Requested features
6 requests- Export in calendar view for printing
- Calendar export to be fixed
- More content in logbook for general aviation
- Reintroduce 'remark' option
- Desktop version available again
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- Integration of other airlines for connecting with friends outside own airline
In-app purchases
FMS 737
No in-app purchases
OffBlock
- OffBlock Pro (1 month)$2.991 Month
- OffBlock Pro+ (1 month)$6.991 Month
- OffBlock Pro (1 year)$29.991 Year
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- OffBlock Pro+ (1 year)$69.991 Year









