Comparison

Automobile Engineering Book vs PDFReader Voice

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

PDFReader Voice

Features
Read full description

TeaManjur PDF Reader brings elegance and power together in a minimalist design inspired by Apple’s latest interface.

Screenshots

Automobile Engineering Book4 screens
PDFReader Voice4 screens

Verdict

The call

The clearest difference is price: Automobile Engineering Book at Free against PDFReader Voice's $0.99. Automobile Engineering Book also leads on iOS requirement (14.0 vs 26.0). PDFReader Voice's advantage is in-app purchases (none vs 5) and update cadence (every 4 days vs every 5 weeks). On ads 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

Automobile Engineering Book is free to download; PDFReader Voice costs $0.99 up front. Automobile Engineering Book sells 4 in-app purchases, starting at $2.99 per 3 months. PDFReader Voice asks for nothing beyond the download.

UpkeepUpdate frequency

Automobile Engineering Book ships an update every 5 weeks, PDFReader Voice every 4 days. The most recent releases landed on October 16, 2026 and September 19, 2026 respectively.

Scorecard4 real differences · 6 level
Automobile Engineering Book versus PDFReader Voice: the parameters behind the verdict, then further details
ParameterAutomobile Engineering BookPDFReader Voice
PriceFree — better$0.99
Rating4.6 (9 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings9 — better—
Update frequencyEvery 5 weeksEvery 4 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better26.0
Further details — not scored
Size136 MB3 MB
Age rating4+4+
DeveloperOleksandr PeresheinMANJUR KOLHAR

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
None

PDFReader Voice

No in-app purchases

Questions

Is Automobile Engineering Book free?
Automobile Engineering Book is free to download, with in-app purchases available.
Is PDFReader Voice free?
PDFReader Voice costs $0.99, with no in-app purchases.
Do Automobile Engineering Book or PDFReader Voice have ads?
Neither Automobile Engineering Book nor PDFReader Voice shows ads.
Which is updated more often, Automobile Engineering Book or PDFReader Voice?
Automobile Engineering Book ships an update every 5 weeks, and PDFReader Voice every 4 days. Most recently, Automobile Engineering Book was updated on October 16, 2026 and PDFReader Voice on September 19, 2026.

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