Comparison

FMS 737 vs OffBlock

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • B737 FMS simulation
  • Free play mode
  • Accurate simulation
  • Easy-to-use interface
  • Complete set of functions
  • Pilot familiarization tool
Features
Read full description

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.

About

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.

Highlights
  • Smart flight logging
  • Automated roster imports
  • Integrated aircraft management
  • Calendar with timeline
  • Crew communication tools
  • Roster sharing
  • Data export in official formats
Features
Read full description

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

OffBlock4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

FMS 737 ships an update every 10 months, OffBlock every 2 months. Both last shipped on November 2, 2026.

Scorecard7 real differences · 3 level
FMS 737 versus OffBlock: the parameters behind the verdict, then further details
ParameterFMS 737OffBlock
PriceFreeFree
Rating3.0 (4 ratings)4.8 (104 ratings) — better
Positive reviews50.0% of reviews — better48.3% of reviews
Number of ratings4104 — better
Update frequencyEvery 10 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPadiPhone, iPad, iPod — better
Requires iOS18.615.0 — better
Further details — not scored
Size28 MB275 MB
Age rating4+4+
DeveloperECA FarosOffBlock GmbH

Customer experience

FMS 737

All ratings4 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

OffBlock

All ratings104 ratings
Positive94.2%
Neutral0.0%
Negative5.8%
Written reviews87 reviews
Positive48.3%
Neutral10.3%
Negative41.4%

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
Show 9 more
  • 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
Show 1 more
  • Integration of other airlines for connecting with friends outside own airline

In-app purchases

None

FMS 737

No in-app purchases

4 purchases

OffBlock

Subscriptions4
  • OffBlock Pro (1 month)$2.991 Month
  • OffBlock Pro+ (1 month)$6.991 Month
  • OffBlock Pro (1 year)$29.991 Year
Show 1 more
  • OffBlock Pro+ (1 year)$69.991 Year

Questions

Is FMS 737 free?
FMS 737 is free to download, with no in-app purchases.
Is OffBlock free?
OffBlock is free to download, with in-app purchases available.
Which has better reviews, FMS 737 or OffBlock?
OffBlock is rated higher. FMS 737 averages 3.0 out of 5 from 4 ratings, while OffBlock averages 4.8 from 104 ratings.
Do FMS 737 or OffBlock have ads?
Neither FMS 737 nor OffBlock shows ads.
Which is updated more often, FMS 737 or OffBlock?
FMS 737 ships an update every 10 months, and OffBlock every 2 months. Most recently, FMS 737 was updated on November 2, 2026 and OffBlock on November 2, 2026.

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