Comparison

Automobile Engineering Book vs OBD2 Fault Codes with Solution

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

Head to head
About

Automobile Engineering Book

This app provides a comprehensive yet accessible guide to automobile engineering. It covers basic vehicle structure, common malfunctions, and maintenance rules in a clear, engaging format with ample illustrations. Ideal for novice drivers and anyone seeking to understand their car better.

Highlights
  • Basic vehicle structure information
  • Common malfunctions and solutions
  • Operation and maintenance rules
  • Simple language explanations of car systems
  • Extensive illustrative material
Features
Read full description

Getting started on this application, we set a goal to present a rather difficult theoretical course on the automobile engineering in the most accessible form. Basic knowledge of vehicles' structure will supply a novice driver with confidence in the fact that he will be able to control the situation of any breakdown, predict the amount of necessary work at the service station and just can competently exploit its vehicle. The free form of presentation, deprived of a dry technical syllable, and a large amount of illustrative material will facilitate the learning process and will make it rapid and efficient. The tutorial may be useful for students of driving schools, novice drivers and a wide range of readers who want to get basic knowledge about the car. WHAT CAN YOU FIND IN THIS APPLICATION? - Basic information about mechanism of modern cars - List of the most common malfunctions and ways to eliminate them - Operation and maintenance rules of the car - Description of the car systems in simple language - Plenty useful information that allows you to feel confident in any situation THE APPLICATION IS INTENDED FOR: - Students of driving schools and novice drivers - Parents who want to be confident in the high level of preparation of their children - All drivers who want to know more about their iron horse - Service managers (for better mutual understanding with customer) CONTENT: - Introduction - Car History - Body Types of Passenger Cars - Wheel Arrangement - Classification of Cars - Basic Elements of Passenger Car - Layouts of Major Vehicle Component Parts - Basic Technical Specifications of the Car - About Engines in General - Basic Single-Cylinder Internal Combustion Engine - Classifications of Engines - Basic Technical Specifications of Engine - Gas Distribution Mechanism (GDM) - Cylinder Head - Engine Block and Crank Gear - Engine Cooling System - Engine Lubrication System - Air Intake and Exhaust Systems - Feed System (Fuel System). Main Differences Between Gasoline and Diesel Engines - Feed System of Modern Engines - Purpose of Transmission - Manual Transmission - Automatic Transmission - Drive Gear and Differential. Purpose, Arrangement and Types - Drive Shafts and Hinged Joints. Purpose, Arrangement and Types - All-wheel drive cars - Purpose, Arrangement and Types of Car Suspensions - Wheels and Tires. Arrangement, Purpose and Marking - Wheel Alignment Angles - Brake Control. Purpose - Components - Flow Chart. Brake Circuits - Purpose and Operation of the Anti-Lock Braking System - Purpose and Arrangement of Steering - Purpose and Types of Power Steering - Purpose and General Arrangement of the Car Body - Vehicle Aerodynamics - Airbags - Seat Belts and Active Head Restraints - Means of Pedestrian Protection - Child Restraining Devices - Electrical Equipment and Electric Systems. General Information - Battery Pack (Battery). Purpose, Arrangement and Types - Battery Pack Maintenance. Safety Precautions when Servicing the Battery Pack - Ignition System (Gasoline Engines only) - Preheating System - Charging System. Generator, its Arrangement and Operation - Startup System. Starter, its Arrangement and Operation - Exterior Lighting System. Purpose and Operating Principle - Wipers and Washers. Purpose and Operating Principle - Pointers and Indicators - Heating and Air Conditioning System. Purpose, Arrangement and Operating Principle - Precautions when the Car Owner Carries out Maintenance - Operations that Shall Be Performed in order to Maintain the Normal Working Order of the Vehicle - Basic Car Maintenance Operations - Car Maintenance Schedule - Driver’s Memo - Abbreviations - Glossary The most qualitative textbook about automobile engineering 2025! Be careful behind the wheel! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

OBD2 Fault Codes with Solution

Decode automotive trouble codes with a comprehensive database and detailed explanations. Find step-by-step guides to diagnose and resolve issues, making car maintenance accessible for all users.

Highlights
  • OBD2 code database
  • Detailed code descriptions
  • Solution guides
  • User-friendly interface
  • Vehicle make and model coverage
Features
Read full description

Discover a comprehensive and user-friendly automotive companion in the "OBD2 Codes & Their Solution" app. Whether you're a seasoned mechanic, a DIY enthusiast, or simply a car owner looking to understand your vehicle better, this app is your go-to resource for decoding OBD2 trouble codes and finding solutions to resolve them. OBD2 Code Database: Access an extensive database of OBD2 trouble codes, covering a wide range of vehicle makes and models. Quickly look up the specific code that's causing your vehicle's warning light to illuminate. Detailed Code Descriptions: Get in-depth explanations for each trouble code, including its meaning, potential causes, and the impact on your vehicle's performance. Say goodbye to cryptic error messages! Solution Guides: Receive step-by-step guides and expert recommendations on how to diagnose and resolve the issues associated with each code. Save time and money by tackling car problems with confidence. User-Friendly Interface: Enjoy a sleek and intuitive interface designed for both novice and experienced users. Navigating through the app is a breeze, making it accessible for everyone.

Screenshots

Automobile Engineering Book4 screens
OBD2 Fault Codes with Solution4 screens

Verdict

The call

The clearest difference is review sentiment: Automobile Engineering Book at 100% against OBD2 Fault Codes with Solution's 50%. Automobile Engineering Book also leads on rating (4.6 vs 3.7) and ads (none vs shown). OBD2 Fault Codes with Solution's advantage is iOS requirement (12.0 vs 14.0). On price, in-app purchases, monetization model and device support 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. Automobile Engineering Book sells 4 in-app purchases, starting at $2.99 per 3 months and OBD2 Fault Codes with Solution sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Automobile Engineering Book holds the better App Store score, 4.6 against 3.7. Both are backed by a comparable volume of ratings — 9 and 3 respectively. Written reviews point the same way: 100% of Automobile Engineering Book's written reviews are positive against 50% of OBD2 Fault Codes with Solution's.

UpkeepUpdate frequency

Automobile Engineering Book ships an update every 5 weeks, OBD2 Fault Codes with Solution every 9 months. The most recent releases landed on August 4, 2026 and September 24, 2026 respectively.

Scorecard6 real differences · 4 level
Automobile Engineering Book versus OBD2 Fault Codes with Solution: the parameters behind the verdict, then further details
ParameterAutomobile Engineering BookOBD2 Fault Codes with Solution
PriceFreeFree
Rating4.6 (9 ratings) — better3.7 (3 ratings)
Positive reviews100.0% of reviews — better50.0% of reviews
Number of ratings9 — better3
Update frequencyEvery 5 weeks — betterEvery 9 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.012.0 — better
Further details — not scored
Size136 MB75 MB
Age rating4+17+
DeveloperOleksandr PeresheinMuhammad Asad Khan

Customer experience

Automobile Engineering Book

All ratings9 ratings
Positive88.9%
Neutral0.0%
Negative11.1%
Written reviews14 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

OBD2 Fault Codes with Solution

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

4 purchases

Automobile Engineering Book

Subscriptions1
  • Full version3 Days trial2 variants$2.993 Months
One-time3
  • Full version for three months$2.99
  • Full version for one year$4.99
  • Full version forever$6.99
1 purchases

OBD2 Fault Codes with Solution

One-time1
  • Get Premium Version$1.99

Questions

Is Automobile Engineering Book free?
Automobile Engineering Book is free to download, with in-app purchases available.
Is OBD2 Fault Codes with Solution free?
OBD2 Fault Codes with Solution is free to download, with in-app purchases available.
Which has better reviews, Automobile Engineering Book or OBD2 Fault Codes with Solution?
Automobile Engineering Book is rated higher. Automobile Engineering Book averages 4.6 out of 5 from 9 ratings, while OBD2 Fault Codes with Solution averages 3.7 from 3 ratings.
Do Automobile Engineering Book or OBD2 Fault Codes with Solution have ads?
OBD2 Fault Codes with Solution shows ads; Automobile Engineering Book does not.
Which is updated more often, Automobile Engineering Book or OBD2 Fault Codes with Solution?
Automobile Engineering Book ships an update every 5 weeks, and OBD2 Fault Codes with Solution every 9 months. Most recently, Automobile Engineering Book was updated on August 4, 2026 and OBD2 Fault Codes with Solution on September 24, 2026.

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