Comparison

AeroEngineS vs EASA Part 66 Exam Trainer

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

Head to head
About

AeroEngineS

This app simulates the thermodynamic cycles and performance of various aircraft and rocket engines. It calculates key parameters like thrust, mass flow, and emissions, and can predict compressor map operating points.

Highlights
  • Turbojet and turbofan engine simulation
  • Rocket engine cycle analysis
  • Ramjet engine simulation
  • Emissions calculation
  • Compressor map prediction
  • Thermodynamic cycle analysis
Features
Read full description

Aircraft Engine Performance at Design Point - Subsonic/Supersonic 1-Spool Turbojet - Subsonic 2-Spool Turbofan - Subsonic 2-Spool Boosted Turbofan - Subsonic 3-Spool Turbofan - Analysis of the Thermodynamic Cycle - Nozzle Area and Performance (Thrust, Power etc.) calculation - Mass Flows (Core, Bypass, Fuel) - Automatic calculation of ambient conditions based on the flight altitude using the International Standard Atmosphere model - Automatic calculation of Cp, gama, R for each component based on temperature and Fuel to Air Ratio - Automatic calculation of isentropic efficiency for each compressor and turbine based on polytropic efficiency and pressure ratio Hybrid Precooled Rocket Engine at Design Point - Analysis of the combined Thermodynamic Cycles with Air, Hydrogen & Helium as working fluids Ramjet Engine at Design Point - Simulation of the thermodynamic cycle of a hydrogen-fuelled Ramjet engine at optimized conditions. Ramjet Engine at Design Point - Simulation of the thermodynamic cycle of a hydrogen-fuelled Ramjet engine at optimized conditions. Supersonic 2-spool Turbojet Engine at Design Point - Simulation of the thermodynamic cycle of a Supersonic 2-spool turbojet engine with reheat. Aircraft Emissions - Emissions calculation for aircraft engines in LTO cycle and Cruise - Type of turbofan engines used: 1. Subsonic 2-Spool, 2. Subsonic 3-Spool Compressor Map Operating Point Prediction using - Scaling Techniques on an existing HPC map - Artificial Neural Networks to interpolate the existing map's data ______________________________________________________ Developer: Aggelos Gaitanis Original creator: Evangelia Pontika HyRE, Ramjet tab programmer: Spiros Tsentis Supersonic 2-spool Reheated tab programmer: Anastasios Saflekos Emissions tab developer/programmer: Maria Bakali Advisor: Ioanna Aslanidou, Konstantinos Kyprianidis Supervisor: Anestis Kalfas

About

EASA Part 66 Exam Trainer

Prepare for EU Part 66 aircraft maintenance engineer exams with over 750 multiple-choice questions across various modules. This app serves as a supplementary training tool for classroom learning, allowing you to practice on the go.

Highlights
  • Over 750 multiple-choice questions
  • Covers multiple EU Part 66 modules
  • B1.1 / A1 exam preparation
  • Supplementary training tool
  • Practice on the go
  • Developed by skilled engineers
Features
Read full description

Test your skills for the EU PART 66 modules exams with this neat traning app. There are more than 750 questions divided into all the different modules for B1.1 / A1 exams. The Part 66 Aircraft Maintenance Engineer Multiple Choice App is the perfect supplement to the regular part 66 classroom training, where you can train yourself on the run. Modules featured in this version: + MODULE 1: MATHEMATICS + MODULE 2: PHYSICS + MODULE 3: ELECTRICAL FUNDAMENTALS + MODULE 4: ELECTRONIC FUNDAMENTALS + MODULE 5: DIGITAL TECHNIQUES / ELECTRONIC INSTRUMENT SYSTEMS + MODULE 6: MATERIALS & HARDWARE + MODULE 7: MAINTENANCE PRACTICES + MODULE 8: BASIC AERODYNAMICS + MODULE 9: HUMAN FACTORS + MODULE 10: AVIATION LEGISLATION + MODULE 11: AEROPLANE AERODYNAMICS, STRUCTURES AND SYSTEMS + MODULE 15: GAS TURBINE ENGINE + MODULE 17: PROPELLER What we are currently working on for the next version: + B1.2 + B1.3 This app is developed to help you with the part 66 multiple choice exams, and you are very welcome to help us improve the app by sending us multiple choice questions and suggestions for improvements. Furthermore, if you find some bugs please send don’t hesitate to send us an email. Please note that this app is an unofficial app made by skilled Aircraft Maintenance Engineers from all over the world. We do our best to keep it updated at all times and make the best content to our future colleagues. Please help us in our work by sharing the app with your friends, if you like what we are doing. If you have any critical comments to the app's functionality or content, please use the in-app commenting system to let us know, how we can make the app even better. Thanks in advance :)

Screenshots

AeroEngineS4 screens
EASA Part 66 Exam Trainer4 screens

Verdict

The call

The clearest difference is in-app purchases: AeroEngineS at none against EASA Part 66 Exam Trainer's 10. AeroEngineS also leads on update cadence (every 3 days vs every 7 months). EASA Part 66 Exam Trainer's advantage is ratings volume (6 vs 1). On price, rating, ads and monetization model 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. EASA Part 66 Exam Trainer sells 10 one-off in-app purchases. AeroEngineS asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

AeroEngineS holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: EASA Part 66 Exam Trainer has 6 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

AeroEngineS ships an update every 3 days, EASA Part 66 Exam Trainer every 7 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard3 real differences · 7 level
AeroEngineS versus EASA Part 66 Exam Trainer: the parameters behind the verdict, then further details
ParameterAeroEngineSEASA Part 66 Exam Trainer
PriceFreeFree
Rating5.0 (1 ratings) — better4.8 (6 ratings)
Positive reviews—100.0% of reviews
Number of ratings16 — better
Update frequencyEvery 3 days — betterEvery 7 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.0 — better15.0
Further details — not scored
Size7 MB79 MB
Age rating4+4+
DeveloperAristotle University of ThessalonikiDavid Alexander Hansen

Customer experience

AeroEngineS

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

EASA Part 66 Exam Trainer

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

AeroEngineS

No in-app purchases

10 purchases

EASA Part 66 Exam Trainer

One-time10
  • Module 5 for the Part 66 exam$0.99
  • Module 6 for the Part 66 exam$0.99
  • Module 7 for the Part 66 exam$0.99
Show 7 more
  • Module 8 for the Part 66 exam$0.99
  • Module 10 for the Part 66 exam$0.99
  • Module 15 for the Part 66 exam$0.99
  • Module 9 for the Part 66 exam$0.99
  • Module 11A for the Part 66 exam$0.99
  • Module 4 for the Part 66 exam$0.99
  • Unlock all modules forever$2.99

Questions

Is AeroEngineS free?
AeroEngineS is free to download, with no in-app purchases.
Is EASA Part 66 Exam Trainer free?
EASA Part 66 Exam Trainer is free to download, with in-app purchases available.
Which has better reviews, AeroEngineS or EASA Part 66 Exam Trainer?
AeroEngineS is rated higher. AeroEngineS averages 5.0 out of 5 from 1 ratings, while EASA Part 66 Exam Trainer averages 4.8 from 6 ratings.
Do AeroEngineS or EASA Part 66 Exam Trainer have ads?
Neither AeroEngineS nor EASA Part 66 Exam Trainer shows ads.
Which is updated more often, AeroEngineS or EASA Part 66 Exam Trainer?
AeroEngineS ships an update every 3 days, and EASA Part 66 Exam Trainer every 7 months. Most recently, AeroEngineS was updated on November 2, 2026 and EASA Part 66 Exam Trainer on November 3, 2026.

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