# Leon vs Onboard Performance Tool

The clearest difference is rating: Leon at 4.3 against Onboard Performance Tool's 3.5. Leon also leads on update cadence (every 2 weeks vs every 6 months). On price, review sentiment, ratings volume and ads there is nothing between them.

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

Leon holds the better App Store score, 4.3 against 3.5. Both are backed by a comparable volume of ratings — 8 and 17 respectively. Written reviews complicate that: 9% of Leon's written reviews are positive against 14% of Onboard Performance Tool's, so the app with the better star average is not the one people write more warmly about.

Leon ships an update every 2 weeks, Onboard Performance Tool every 6 months. The most recent releases landed on September 15, 2026 and July 1, 2026 respectively.

## The numbers

| Metric | Leon | Onboard Performance Tool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (8 ratings)](https://appshunter.io/ios/app/leon/id443136426/reviews)** | [3.5 (17 ratings)](https://appshunter.io/ios/app/onboard-performance-tool/id584211407/reviews) |
| Number of ratings | 8 | **17** |
| Positive reviews | 9.1% of reviews | **13.5% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 6 months |
| Monetization | Free | Free |
| Size | 36 MB | 42 MB |
| Requires iOS | **16.0** | 17.6 |
| Devices | **iPhone, iPad** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Leon Software](https://appshunter.io/developer/443136429) | [The Boeing Company](https://appshunter.io/developer/493615170) |

## What reviewers say

### Leon

[App page](https://appshunter.io/ios/app/leon/id443136426)

This application provides aviation crew members with mobile access to crew information managed by air operators. It supports aircraft operations with features for scheduling, rostering, dispatch, and flight watch, all accessible through a central online database.

**Highlights:** Mobile crew information access, Aircraft operations support, Scheduling and rostering, Airplane dispatch, Online flight watch, Centralized database access

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Leon free?

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

### Is Onboard Performance Tool free?

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

### Which has better reviews, Leon or Onboard Performance Tool?

Leon is rated higher. Leon averages 4.3 out of 5 from 8 ratings, while Onboard Performance Tool averages 3.5 from 17 ratings.

### Do Leon or Onboard Performance Tool have ads?

Neither Leon nor Onboard Performance Tool shows ads.

### Which is updated more often, Leon or Onboard Performance Tool?

Leon ships an update every 2 weeks, and Onboard Performance Tool every 6 months. Most recently, Leon was updated on September 15, 2026 and Onboard Performance Tool on July 1, 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.*