# FMS 737 vs OffBlock

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.

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.

## The numbers

| Metric | FMS 737 | OffBlock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (4 ratings)](https://appshunter.io/ios/app/fms-737/id1160243181/reviews) | **[4.8 (104 ratings)](https://appshunter.io/ios/app/offblock/id1231996198/reviews)** |
| Number of ratings | 4 | **104** |
| Positive reviews | **50.0% of reviews** | 48.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 28 MB | 275 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ECA Faros](https://appshunter.io/developer/1109979311) | [OffBlock GmbH](https://appshunter.io/developer/1231996197) |

## What reviewers say

### FMS 737

[App page](https://appshunter.io/ios/app/fms-737/id1160243181)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### OffBlock

[App page](https://appshunter.io/ios/app/offblock/id1231996198)

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:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OffBlock Pro (1 month) | $2.99 | per month |
| OffBlock Pro+ (1 month) | $6.99 | per month |
| OffBlock Pro (1 year) | $29.99 | per year |
| OffBlock Pro+ (1 year) | $69.99 | per year |

**What reviewers like**

- 👍 Great support team
- 👍 App is good and useful
- 👍 Top App
- 👍 Best Support and product
- 👍 Works without difficulty

**What reviewers complain about**

- 😞 Roster import not working
- 😞 App is unusable
- 😞 Way too expensive
- 😞 Service is really bad
- 😞 Data lost

**Reported bugs**

- Roster import not working
- App is unusable
- Roster autodownload and manual download doesn't work
- Stby duties are not visible
- Data lost

**Requested features**

- 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


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*