Comparison

Compressed Air Calc by ALMiG vs Engine Calculator Plus

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

Head to head
About

Compressed Air Calc by ALMiG

This app offers a suite of tools to optimize compressed air stations. It includes unit conversion, pressure drop calculation, condensate development, and receiver sizing. It also helps determine sound pressure levels and leakage quantities.

Highlights
  • Unit converter (pressure, volume, power, flow, energy, temp)
  • Pressure drop calculation
  • Condensate development calculation
  • Receiver size calculation
  • Sound pressure level calculation
  • Leakage quantity determination
Features
Read full description

Ideal for optimizer. ALMiG compressed air Tools provides a collection of important calculation tools for the optimization of your compressed air station. Tools: • Unit converter: pressure, volume, power, volume flow, energy and temperature • Calculation of the pressure drop in the compressed air system • Calculation of the development of condensate during compression • Calculation in standard cubic metres according to DIN 1343 and ISO 2533 • Calculation of optimal receiver size • Calculation of the sound pressure level • …of several sound sources of the same kind and • …of several sound sources of different kinds • Calculation of the minimum cross-section of the exhaust air aperture • Determining the nominal pipe width by calculation • Determining the quantity of leakage • …by emptying the receiver and • …by on-period measurement We are convinced that it´s possible to optimize your compressed air station with a minimum of effort. Use ALMiG Tools to identify potentials for improvement in an easy and fast way. In case you need help or have questions about ALMiG products and services, the App provides a contact form, contact information and FAQs. ALMiG Tools is available in English and German and can be used offline.

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.

Screenshots

Compressed Air Calc by ALMiG4 screens
Engine Calculator Plus4 screens

Verdict

The call

The clearest difference is review sentiment: Compressed Air Calc by ALMiG at 100% against Engine Calculator Plus's 13%. Compressed Air Calc by ALMiG also leads on price (Free vs $2.99) and rating (4.0 vs 3.3). Engine Calculator Plus's advantage is ratings volume (3 vs 1). On update cadence, ads, in-app purchases 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

Compressed Air Calc by ALMiG is free to download; Engine Calculator Plus costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Compressed Air Calc by ALMiG holds the better App Store score, 4.0 against 3.3. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews point the same way: 100% of Compressed Air Calc by ALMiG's written reviews are positive against 13% of Engine Calculator Plus's.

UpkeepUpdate frequency

Compressed Air Calc by ALMiG ships an update every 50 months, Engine Calculator Plus every 48 months. The most recent releases landed on October 18, 2026 and October 27, 2026 respectively.

Scorecard6 real differences · 4 level
Compressed Air Calc by ALMiG versus Engine Calculator Plus: the parameters behind the verdict, then further details
ParameterCompressed Air Calc by ALMiGEngine Calculator Plus
PriceFree — better$2.99
Rating4.0 (1 ratings) — better3.3 (3 ratings)
Positive reviews100.0% of reviews — better12.5% of reviews
Number of ratings13 — better
Update frequencyEvery 50 monthsEvery 48 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better13
Further details — not scored
Size7 MB2 MB
Age rating4+4+
DeveloperALMiG Kompressoren GmbHNitrio

Customer experience

Compressed Air Calc by ALMiG

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Engine Calculator Plus

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews8 reviews
Positive12.5%
Neutral0.0%
Negative87.5%

In-app purchases

None

Compressed Air Calc by ALMiG

No in-app purchases

None

Engine Calculator Plus

No in-app purchases

Questions

Is Compressed Air Calc by ALMiG free?
Compressed Air Calc by ALMiG is free to download, with no in-app purchases.
Is Engine Calculator Plus free?
Engine Calculator Plus costs $2.99, with no in-app purchases.
Which has better reviews, Compressed Air Calc by ALMiG or Engine Calculator Plus?
Compressed Air Calc by ALMiG is rated higher. Compressed Air Calc by ALMiG averages 4.0 out of 5 from 1 ratings, while Engine Calculator Plus averages 3.3 from 3 ratings.
Do Compressed Air Calc by ALMiG or Engine Calculator Plus have ads?
Neither Compressed Air Calc by ALMiG nor Engine Calculator Plus shows ads.
Which is updated more often, Compressed Air Calc by ALMiG or Engine Calculator Plus?
Compressed Air Calc by ALMiG ships an update every 50 months, and Engine Calculator Plus every 48 months. Most recently, Compressed Air Calc by ALMiG was updated on October 18, 2026 and Engine Calculator Plus on October 27, 2026.

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