Leon vs Onboard Performance Tool
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Leon
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.
- Mobile crew information access
- Aircraft operations support
- Scheduling and rostering
- Airplane dispatch
- Online flight watch
- Centralized database access
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LEON is an application designed for crew members. It offers a mobile access to crew information entered by air operators into Leon system. Leon is a software for aviation supporting aircraft operations fearuring many various functions that allow to run different procedures smoothly. It includes aiding in scheduling, aircraft and crew rostering, airplane dispatch, on-line flight watch, aircraft charter sales and many more. it consists of central database accessible through Internet in relation to users' privileges. The new version of the LEON app has a new design and displays office duties that were missing in the previous version.
Onboard Performance Tool
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.
- 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
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*** This application requires configuration files, performance and other databases, available separately. Contact your Boeing representative for details. *** The Onboard Performance Tool (OPT) permits flight crews and ground personnel to perform real-time calculations based on current weather and runway conditions, while adhering to company and regulatory policies and procedures. The Onboard Performance Tool provides self-planning capability through fast and precise calculations. It allows flight crews to calculate the takeoff analysis, landing analysis, and weight and balance information. Instant and accurate calculations save time by correcting for pressure variation, runway conditions, engine bleeds and Minimum Equipment List (MEL) items.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Leon | Onboard Performance Tool |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (8 ratings) — better | 3.5 (17 ratings) |
| Positive reviews | 9.1% of reviews | 13.5% of reviews — better |
| Number of ratings | 8 | 17 — better |
| Update frequency | Every 2 weeks — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad — better | iPad |
| Requires iOS | 16.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 36 MB | 42 MB |
| Age rating | 4+ | 4+ |
| Developer | Leon Software | The Boeing Company |
Customer experience
Leon
Onboard Performance Tool
In-app purchases
Leon
No in-app purchases
Onboard Performance Tool
No in-app purchases
Questions
Is Leon free?
Is Onboard Performance Tool free?
Which has better reviews, Leon or Onboard Performance Tool?
Do Leon or Onboard Performance Tool have ads?
Which is updated more often, Leon or Onboard Performance Tool?
Other comparisons
