# EngineCalc

> Powersports and engine tuning formulas and calculators for mobile devices. (iPhone/iPad app by iTrinity, Inc..)

- Source: https://appshunter.io/ios/app/enginecalc/id378824382 (this page in markdown: same URL + `.md`)
- Developer: [iTrinity, Inc.](https://appshunter.io/developer/547108075)
- Category: Utilities, Sports
- Price: $0.99
- Rating: 2.30/5 from 3 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 6.0 · 8 MB
- Languages: American English
- Released: 2010-06-29
- Data updated: 2026-08-14
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/enginecalc/id378824382/reviews.md

## What is EngineCalc?

EngineCalc is a collection of useful formulas (calculators) for those involved with powersports or engine tuning, in general.

Instead of carrying around a laptop or relying on access to a desktop computer with a spreadsheet, you can get the calculations you need right on the handy iPhone in your pocket.

Here is a partial list of the "calculators" provided here in EngineCalc:

* Actual Volume Flow
* Air Density
* BHP Loss
* Compression Height
* Compression Ratio
* Corrected BHP
* Cylinder Displacement
* Horsepower
* Mass Flow
* Piston Dome Volume
* Piston Speed
* Rod Length
* Simple Horsepower
* Theoretical Volume Flow
* Torque
* Volumetric Efficiency

## Key features

- Powersports formulas
- Engine tuning calculators
- Actual Volume Flow
- Air Density
- Compression Ratio
- Cylinder Displacement
- Volumetric Efficiency

## Chart rankings

- #184 in Top Paid · Utilities (US App Store)

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/enginecalc/id378824382/reviews.md

### 1/5 — Needs to be updated

*2019-09-27, version 1.5.1*

This could be a really good app. It is laid out very well easy to use and switches between Eng/Metric without loosing data. 

Biggest issue is the app crashes when entering data as you move around the app. Then you are always starting over, I was never able to test the power calculations to see how accurate they are. Disappointed to say the least. 

I will be looking for updates, hopefully soon. 

This was test on IOS 12.4.1 September 2019

### 1/5 — Keeps Crashing

*2019-08-14, version 1.5.1*

I tap on various parameters to fill them in and it just keeps crashing. So hasn't proved usable. Also there doesn't seem to be any way to save or share the information so once you leave the app you lose your work. Annoying. iPhone 6s.

### 4/5 — Great but easily could be better

*2011-01-14, version 1.0.1*

Love this ap in terms of concept and ease of use. It's an engine designers dream to have this in their hands. I only wish there was a way to work with metric units. Inches seem to be the only option.

### 5/5 — Great App

*2010-07-12, version 0*

For someone who tunes/tricks cars all day this app is very useful if you are interested in the numbers. It delivers the accurate calculations and my customers want the specs! Great job and much needed for this platform.

### 5/5 — awesome

*2010-06-30, version 0*

Brilliant!

## Frequently asked questions about EngineCalc

### What is EngineCalc used for?

EngineCalc is a collection of formulas and calculators specifically designed for powersports and engine tuning. It helps users perform calculations like compression ratio, cylinder displacement, and horsepower directly on their iPhone.

### How much does EngineCalc cost?

EngineCalc is a paid application priced at $0.99. This one-time purchase grants you access to all the included calculators and formulas.

### What devices does EngineCalc support?

EngineCalc is designed for Apple devices, specifically supporting the iPhone and iPod. It is not currently available for Android or other platforms.

### When was EngineCalc last updated?

The latest version of EngineCalc, 1.5.1, was released on February 17, 2014. The app was originally released on June 29, 2010.

### What is the age rating for EngineCalc?

EngineCalc has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content.

### Does EngineCalc have ads?

No, EngineCalc does not contain advertisements. As a paid application, it offers an ad-free experience for its users.

### What are some of the calculators available in EngineCalc?

EngineCalc includes a variety of calculators such as Actual Volume Flow, Air Density, BHP Loss, Compression Height, Compression Ratio, Cylinder Displacement, Horsepower, and Volumetric Efficiency, among others.

### What do users think of EngineCalc?

Based on the available data, EngineCalc has received 3 ratings with an average of 2.3 stars. This suggests a mixed user reception.

## Version history (last 4 releases)

### 1.5.1 — 2014-02-17

Two exciting new updates this time. First, all the centimeter labels and calculations have been changed to millimeters. A special "thank you" to our friends in the UK for that one.

Second, values that have been typed in or calculated are now carried over into other calculators, thus saving you time and minimizing errors.

This is just the beginning! We have an even more exciting feature in the works. Keep those ideas and suggestions coming. We don't want our developers to get bored!

### 1.5 — 2014-01-12

Latest update includes user friendly metric units.
Compatible with iOS 6 and iOS 7. 
Updated screen format for 4, 4s, 5, 5s, 5c

Thank you for being a supporter of iTrinity-inc ! We look forward to your feedback. Contact us at info@itrinity-inc.com
 If you like our app we would greatly appreciate some positive feedback here in iTunes and please share with others!

### 1.0.1 — 2010-08-25

Minor cosmetic updates:

Splash screen was adjusted so top lettering is not covered by status bar.

Info screen has updated links and text.

Email developer if you have any questions, comments, or suggestions.

### 1.0 — 2010-06-29

No release notes.

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All apps by iTrinity, Inc.: https://appshunter.io/developer/547108075

## Related topics

[itrinity](https://appshunter.io/ios/topics/itrinity)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-14.*