CR Calculator

by HRTuning.com · Tools · Free

On Google Play since September 2011 · Data updated 2026-10-18

Google Play

CR Calculator is made and published by HRTuning.com. AppBrain is an independent app data site and isn't affiliated with HRTuning.com. The app name, icon, screenshots and description belong to HRTuning.com and are shown as published on Google Play.

AppBrain's verdict

EstablishedPoorly rated

Total installs: 59 thousand
Rating on Google Play: 2.78; 281 ratings
Last updated: August 25, 2026

CR Calculator has 59 thousand installs. Users are critical: 2.8 stars from 281 ratings.

Installs

Tracked by AppBrain

Last 30 days: 0
Play install range: 50+ thousand
Launched: September 2011

Installs over time

CR Calculator has been installed 59 thousand times. Over the past 30 days, it has been installed 0 times.

Rankings

Google Play top charts

Google Play Rankings for CR Calculator

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Competitors

Similar apps and more from HRTuning.com

Alternatives to CR Calculator

Releases

Updates seen on Google Play

Version: 2.2.4
Launched: September 2011

Aug 25, 2026UpdateVersion 2.2.4
Jul 27, 2025UpdateVersion 2.2.3
Oct 31, 2022UpdateVersion 2.2.1
Jan 27, 2018UpdateVersion 2.2
Jan 18, 2018UpdateVersion 1.0

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User feedback

Ratings and reviews on Google Play

Google Play Rating history and histogram

120

Comments on CR Calculator for Android

★★★★★ Great app only one problem It won't let put in a negative number for piston dome. Fix that and it is a five star!

★★★★★ Include more F series tech Please update with more sohc F series like the F18 and sohc F20 stroke, rods, pistons etc. and the option to use USDM and JDM spec K20 pistons in F series would be nice.

★★★★★ It made me blow my motor! No not really. I like it and use quite often. Works well, and makes for easy showing to customers what to put in their engines.

★★☆☆☆ Incorrect information It claims a stock ls is 9.6:1? Ha ha ha couldn't be more wrong. Maybe with a hotter piston and some decking/milling. It contradicts information given in one of his other apps. Fix it or take it off the market please

★★☆☆☆ Hmm First use, changed a gasget thickness on a b series... Software quit.

★★☆☆☆ Needs fix Cannot manually make a negative dome volume for the pistons. This throws the compression way off. Will rate higher once fixed. EVO.

Technology

Found in the app by AppBrain

Ads: Contains ads
Price: Free
Libraries: 5
App size: 6.53 MB
Needs Android: 4.0+
Content rating: Everyone

Technologies used by CR Calculator

10 permissions · 5 libraries

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About the app and developer

About CR Calculator

CR Calculator is a tools app developed by HRTuning.com.

Install Statistics

CR Calculator has been installed 59 thousand times. In the last 30 days, the app was installed 0 times.

User Ratings

CR Calculator is rated 2.78 out of 5 stars. The rating is based on 280 ratings.

App Information

CR Calculator is freely available from Google Play. The app size is 6.53 MB. The latest version available is 2.2.4. The last update was on August 25, 2026.

Technical Requirements

CR Calculator requires Android 4.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play since September 2011.

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Developer information for HRTuning.com

HRTuning.com

peter@hrtuning.com

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Store listing

By HRTuning.com, from Google Play

“Compression Calculator for B,D,F/H,K-Series Engines”

Screenshots by HRTuning.com, from the Google Play listing

Description by HRTuning.com Written by the developer, not by AppBrain. Click to read.

Honda B-, D-, F/H- and K-Series Engine Compression Calculator. You can calculate your engine compression by selecting different parameters.

Recent changes:
Android Core Update

Official page on Google Play

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