Comparison

Leon vs TAILLOG

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Mobile crew information access
  • Aircraft operations support
  • Scheduling and rostering
  • Airplane dispatch
  • Online flight watch
  • Centralized database access
Features
Read full description

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.

About

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.

Highlights
  • 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
Read full description

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

Leon4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
Leon versus TAILLOG: the parameters behind the verdict, then further details
ParameterLeonTAILLOG
PriceFreeFree
Rating4.3 (8 ratings)4.9 (10 ratings) — better
Positive reviews9.1% of reviews100.0% of reviews — better
Number of ratings810 — better
Update frequencyEvery 2 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad — betteriPad
Requires iOS16.013.0 — better
Further details — not scored
Size36 MB39 MB
Age rating4+4+
DeveloperLeon SoftwareTAILLOG APS

Customer experience

Leon

All ratings8 ratings
Positive75.0%
Neutral12.5%
Negative12.5%
Written reviews11 reviews
Positive9.1%
Neutral9.1%
Negative81.8%

TAILLOG

All ratings10 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Leon

No in-app purchases

None

TAILLOG

No in-app purchases

Questions

Is Leon free?
Leon is free to download, with no in-app purchases.
Is TAILLOG free?
TAILLOG is free to download, with no in-app purchases.
Which has better reviews, Leon or TAILLOG?
TAILLOG is rated higher. Leon averages 4.3 out of 5 from 8 ratings, while TAILLOG averages 4.9 from 10 ratings.
Do Leon or TAILLOG have ads?
Neither Leon nor TAILLOG shows ads.
Which is updated more often, Leon or TAILLOG?
Leon ships an update every 2 weeks, and TAILLOG every 2 months. Most recently, Leon was updated on September 15, 2026 and TAILLOG on September 14, 2026.

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