# Boeing 737 Systems vs NRRS

The clearest difference is in-app purchases: NRRS at none against Boeing 737 Systems's 10. Boeing 737 Systems's advantage is update cadence (fortnightly vs every 16 months) and iOS requirement (11.0 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Boeing 737 Systems sells 10 one-off in-app purchases. NRRS asks for nothing beyond the download.

Boeing 737 Systems ships an update fortnightly, NRRS every 16 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Boeing 737 Systems | NRRS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (4 ratings)](https://appshunter.io/ios/app/boeing-737-systems/id1462734509/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 16 months |
| Monetization | Free | — |
| Size | 221 MB | 3 MB |
| Requires iOS | **11.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Flyco](https://appshunter.io/developer/805173352) | [Answers4Families](https://appshunter.io/developer/530164780) |

## What reviewers say

### Boeing 737 Systems

[App page](https://appshunter.io/ios/app/boeing-737-systems/id1462734509)

Explore and interact with the complex systems of a Boeing 737 aircraft. This application provides detailed schematics and operational insights into various aircraft components, from bleed air to thrust reversers.

**Highlights:** Interactive system experience, Detailed schematics, Bleed air system, Electric power system, Fuel and hydraulic systems, Lighting and anti-ice systems, Fire extinguisher systems

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| B737 Electric Power | Free | one-time |
| Electric Power Cnt And Monitor | Free | one-time |
| B737 Engine Fuel Oil System | Free | one-time |
| B737 Fuel System | Free | one-time |
| Hydraulic Power Distribution | Free | one-time |
| B737 Flaps And Slats | Free | one-time |
| B737 Speed Breaks | Free | one-time |
| B737 Thurst Reverser | Free | one-time |
| B737 Air Conditioning Pack | Free | one-time |
| B737 Power Plant | Free | one-time |


### NRRS

[App page](https://appshunter.io/ios/app/nrrs/id1490934580)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Boeing 737 Systems free?

Boeing 737 Systems is free to download, with in-app purchases available.

### Is NRRS free?

NRRS is free to download, with no in-app purchases.

### Do Boeing 737 Systems or NRRS have ads?

Neither Boeing 737 Systems nor NRRS shows ads.

### Which is updated more often, Boeing 737 Systems or NRRS?

Boeing 737 Systems ships an update fortnightly, and NRRS every 16 months. Most recently, Boeing 737 Systems was updated on November 3, 2026 and NRRS on November 3, 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.*