Comparison

Engine Calculator Plus vs Convertura

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

Head to head
About

Engine Calculator Plus

Calculate engine specifications for various car and plane engines, including displacement, compression ratio, and horsepower. Supports metric and imperial systems with a user-friendly interface and 3D engine visualization.

Highlights
  • Engine displacement calculation
  • Compression ratio calculation
  • Horsepower estimation
  • Metric and Imperial support
  • 3D engine display
  • Copyable results
Features
Read full description

Engine Calculator Plus is designed to help you figure out engine specs for all car or plane engine types from inline 4 to V12 Engine. This calculator provides calculations for engine displacement based on either the metric or US standard system. Features: - User friendly UI - Engine type selection from single cylinder to complex W16 or even custom cylinder count. - Display 3D engine from selection - Metric or Imperial input - Output Engine Displacement on cc, liter and cubic inch - Output Compression ratio of engine - Calculate estimate horse power in HP and Kilowatts - Include formula to calculate the engine displacement in help page - Result are copy-able to other app The engine's static compression ratio is easily calculated if you know six measurements or volumes: Bore - The diameter of the cylinder bore Stroke - The distance the piston travels in the cylinder Deck Height - The distance between the top of the cylinder bore and the top of the piston, when the piston is at TDC (Top Dead Center, or at its highest position) Piston top volume - If the piston is dished, domed, or dimpled, that has an affect on compression ratio. Combustion chamber volume - How much open space is in the head above the cylinder Compression ratios: Higher compression ratios cylinder produces better power and fuel economy. It is not just because the charge is squeezed harder and the resulting combustion pressure goes up, but also because the higher expansion ratio allows more energy to be extracted from the original high-pressure. High compression ratio engines burn both much more cleanly and much more efficiently than lower-compression engines. However a lower compression motor will let you run cheap fuel, but your motor won't be as efficient, less efficient and less power. *Thanks for your support, stay tune for more update to come.

About

Convertura

Features
Read full description

Convertura: The Ultimate Unit Conversion Tool Say goodbye to the hassle of manual conversions! Convertura is your all-in-one unit conversion app, designed to simplify your everyday tasks and professional needs. With 12 versatile categories and a history of conversions at your fingertips, Convertura ensures you always have the right tools for the job. Key Features: 12 Comprehensive Categories: Effortlessly convert units across: Area Data Transfer Speeds Digital Storage Units Energy Length Power Pressure Speed Temperature Time Volume Weight Conversion History: Easily revisit your recent conversions for added convenience. User-Friendly Interface: Sleek design with intuitive navigation for a seamless experience. Accurate Results: Trusted algorithms for precise and reliable unit conversions every time. Why Choose Convertura? Whether you're cooking, traveling, studying, or working on technical projects, Convertura is the go-to solution for all your conversion needs. From converting digital storage to understanding temperature differences across scales, this app is your reliable partner. Download Convertura Today! Make your life easier with Convertura, the smartest way to handle unit conversions. Download now and discover the power of simplicity and precision in your pocket! Privacy Policy: https://www.keepsimple.org/page/convertura-privacy-policy EULA: Apple's Standard EULA - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Engine Calculator Plus4 screens
Convertura4 screens

Verdict

The call

The clearest difference is price: Convertura at Free against Engine Calculator Plus's $2.99. Convertura also leads on update cadence (every 4 days vs every 48 months). Engine Calculator Plus's advantage is in-app purchases (none vs 3) and chart position (#183 vs unranked). 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

Convertura is free to download; Engine Calculator Plus costs $2.99 up front. Convertura sells 3 in-app purchases, starting at $1.99 per month. Engine Calculator Plus asks for nothing beyond the download.

UpkeepUpdate frequency

Engine Calculator Plus ships an update every 48 months, Convertura every 4 days. The most recent releases landed on September 10, 2026 and February 28, 2026 respectively.

Scorecard5 real differences · 6 level
Engine Calculator Plus versus Convertura: the parameters behind the verdict, then further details
ParameterEngine Calculator PlusConvertura
Price$2.99Free — better
Rating4.0 (1 ratings) — better—
Positive reviews12.5% of reviews—
Number of ratings1 — better—
Update frequencyEvery 48 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
Best chart rank#183 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13 — better17.0
Further details — not scored
Size2 MB4 MB
Age rating4+4+
DeveloperNitrioHakan Akturk

In-app purchases

None

Engine Calculator Plus

No in-app purchases

3 purchases

Convertura

Subscriptions2
  • Monthly Subscription$1.991 Month
  • Yearly Subscription7 Days trial$6.991 Year
One-time1
  • Life Time Premium$19.99

Questions

Is Engine Calculator Plus free?
Engine Calculator Plus costs $2.99, with no in-app purchases.
Is Convertura free?
Convertura is free to download, with in-app purchases available.
Do Engine Calculator Plus or Convertura have ads?
Neither Engine Calculator Plus nor Convertura shows ads.
Which is updated more often, Engine Calculator Plus or Convertura?
Engine Calculator Plus ships an update every 48 months, and Convertura every 4 days. Most recently, Engine Calculator Plus was updated on September 10, 2026 and Convertura on February 28, 2026.

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