# Onboard Performance Tool vs Acron B737NG ETHOS

The clearest difference is rating: Onboard Performance Tool at 3.5 against Acron B737NG ETHOS's 3.0. Onboard Performance Tool also leads on ratings volume (17 vs 2). Acron B737NG ETHOS's advantage is iOS requirement (15.6 vs 17.6). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Onboard Performance Tool holds the better App Store score, 3.5 against 3.0. That said, the two scores are not equally well evidenced: Onboard Performance Tool has 17 ratings behind it against 2, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 6 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Onboard Performance Tool | Acron B737NG ETHOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (17 ratings)](https://appshunter.io/ios/app/onboard-performance-tool/id584211407/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/acron-b737ng-ethos/id1583033489/reviews) |
| Number of ratings | **17** | 2 |
| Positive reviews | 13.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | Every 6 months |
| Monetization | Free | Free |
| Size | 42 MB | 18 MB |
| Requires iOS | 17.6 | **15.6** |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [The Boeing Company](https://appshunter.io/developer/493615170) | [Aerosim](https://appshunter.io/developer/491766443) |

## What reviewers say

### Onboard Performance Tool

[App page](https://appshunter.io/ios/app/onboard-performance-tool/id584211407)

This application enables flight crews and ground personnel to perform real-time performance calculations for flights. It provides fast and precise data for takeoff, landing, and weight and balance, accounting for various environmental and operational factors.

**Highlights:** Real-time performance calculations, Takeoff analysis, Landing analysis, Weight and balance information, Accounts for weather and runway conditions, Corrects for pressure variation and MEL items

**In-app purchases:** none


### Acron B737NG ETHOS

[App page](https://appshunter.io/ios/app/acron-b737ng-ethos/id1583033489)

This application serves as a Flight Management System Trainer for aviation professionals. It enables users to run courseware or freeplay simulations, requiring an account from an affiliated Acron ETHOS training partner.

**Highlights:** Flight Management System Trainer, Courseware simulation, Freeplay simulation, Aviation industry focus, Requires user account

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

**In-app purchases:** none


## Frequently asked questions

### Is Onboard Performance Tool free?

Onboard Performance Tool is free to download, with no in-app purchases.

### Is Acron B737NG ETHOS free?

Acron B737NG ETHOS is free to download, with no in-app purchases.

### Which has better reviews, Onboard Performance Tool or Acron B737NG ETHOS?

Onboard Performance Tool is rated higher. Onboard Performance Tool averages 3.5 out of 5 from 17 ratings, while Acron B737NG ETHOS averages 3.0 from 2 ratings.

### Do Onboard Performance Tool or Acron B737NG ETHOS have ads?

Neither Onboard Performance Tool nor Acron B737NG ETHOS shows ads.

### Which is updated more often, Onboard Performance Tool or Acron B737NG ETHOS?

Onboard Performance Tool ships an update every 6 months, and Acron B737NG ETHOS every 6 months. Most recently, Onboard Performance Tool was updated on October 24, 2026 and Acron B737NG ETHOS on October 24, 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.*