Leon vs TAILLOG
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.
TAILLOG
This app automates flight plan reporting for certified pilots, eliminating manual calculations and paperwork. It allows for last-minute changes, automatic registration of flight events, and generates a PDF flight log for easy archiving.
- Automatic flight plan registration
- Last-minute changes from cockpit
- Automatic off/on-block registration
- Automatic airborne/on-ground registration
- Waypoint passage tracking
- Fuel notification system
- Automated PDF flight log generation
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TAILLOG is the flight plan reporting app for Apple iPad and iPad mini, intended for use on flights only by certified pilots or educational purposes of pilots. TAILLOG is the airline industry’s first app with a fully integrated electronic flight plan automatically registering and reporting the flight progress. TAILLOG dispenses with manual reporting and calculation of times, fuel consumption etc.; miscalculations and missing report transmissions are therefore eliminated. With TAILLOG, the daily handling and administration of paper flight plans are history. With TAILLOG, you can download your scheduled flight plan directly from your flight plan provider. Among other facilities, you can make last-minute changes directly from the cockpit, automatically register off-/on-block, airborne/on-ground plus all waypoint passages. After the flight, the automatically completed flight log is e-mailed directly to filing as a PDF file. TAILLOG eliminates all the paperwork for your flight plan. Missing registrations and miscalculations are now history; the automatic reporting facilitates work in the cockpit, all while ensuring a correctly completed flight plan – to the great benefit of the pilot as well as the administration – each time! FEATURES • LAST-MINUTE CHANGES : Make last-minute changes directly from the cockpit • OFF/ON-BLOCK : Automatic registration of off-/on-block • AIRBORNE/ON-GROUND : Automatic registration of airborne/on-ground • WAYPOINT PASSAGES : Automatic registration of all waypoint passages • FUEL NOTIFICATION : Notification system, helping you to enter the fuel status during the flight • LOG & ARCHIVE : Check your flight plan and log and archive by e-mail • ERROR PROOFING : Eliminates missing data and miscalculations HOW TO USE (see below links to quick guide and user manual) 1. LOGIN by creating an account for the TAILLOG system 2. CONNECT to your flight plan provider with your belonging account details. 3. SEARCH for your flight plan, and do last-minute changes 4. ACTIVATE your flight plan. 5. SEND completed flight log for archiving 6. ENJOY your paperless and fully automated flight plan reporting! During activation, the app will continue running in the background. Please notice that continued use of GPS running in the background can dramatically decrease battery life. You can contact us by e-mail: support@taillog.aero For terms of use and privacy policy: https://taillog.aero/support/
Screenshots
Verdict
The clearest difference is review sentiment: TAILLOG at 100% against Leon's 9%. TAILLOG also leads on rating (4.9 vs 4.3) and iOS requirement (13.0 vs 16.0). Leon's advantage is update cadence (every 2 weeks vs every 2 months). On price, ratings volume, ads and in-app purchases 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.
TAILLOG holds the better App Store score, 4.9 against 4.3. Both are backed by a comparable volume of ratings — 8 and 10 respectively. Written reviews point the same way: 9% of Leon's written reviews are positive against 100% of TAILLOG's.
Leon ships an update every 2 weeks, TAILLOG every 2 months. The most recent releases landed on September 15, 2026 and September 14, 2026 respectively.
| Parameter | Leon | TAILLOG |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (8 ratings) | 4.9 (10 ratings) — better |
| Positive reviews | 9.1% of reviews | 100.0% of reviews — better |
| Number of ratings | 8 | 10 — better |
| Update frequency | Every 2 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad — better | iPad |
| Requires iOS | 16.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 36 MB | 39 MB |
| Age rating | 4+ | 4+ |
| Developer | Leon Software | TAILLOG APS |
Customer experience
Leon
TAILLOG
In-app purchases
Leon
No in-app purchases
TAILLOG
No in-app purchases







