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Last updated on: 2026-05-30
Android Apps > Tools > CR Calculator
CR Calculator icon

CR Calculator

2.2.3
HRTuning.com
2.78
282 reviews
50,000+
Downloads
Free

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

CR Calculator Screenshot 1 of 3
CR Calculator Screenshot 2 of 3
CR Calculator Screenshot 3 of 3

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About CR Calculator

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

How many times has CR Calculator been downloaded?

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

What is the rating of CR Calculator?

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

Is CR Calculator free?

CR Calculator is free to download. The APK download size is 6.48 MB. The latest version available is 2.2.3. The last update was on July 27, 2025.

What are the requirements for CR Calculator?

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

Description
B-, D-, F/H- and K-Series Engine Compression Calculator. Recent changes: Android update
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More data about CR Calculator

Price Free to download
Total downloads 59 thousand
Recent downloads 0
Rating 2.78 based on 280 ratings
Ranking Not ranked
Version 2.2.3
APK size 6.47 MB
Number of libraries 5
Designed for Android 4.0+
Suitable for Everyone
Ads Contains ads

App Performance Report

Get a detailed PDF report for CR Calculator with download trends, rating history, and key performance statistics — useful for competitive research or tracking your own app. Learn more

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Google Play Rating history and histogram

60
60
30
0
120

Downloads over time

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

Changelog of CR Calculator

  • Jul 27, 2025UpdateVersion 2.2.3
  • Oct 31, 2022UpdateVersion 2.2.1
  • Jan 27, 2018UpdateVersion 2.2
  • Jan 18, 2018UpdateVersion 1.0
  • Jun 4, 2017Installs50,000+ installs
  • Jun 24, 2012Installs10,000+ installs
  • Jan 7, 2012Installs5,000+ installs
  • Oct 23, 2011UpdateVersion 1.2
  • Oct 16, 2011Installs1,000+ installs
  • Oct 9, 2011Installs500+ installs
  • Sep 29, 2011Installs100+ installs
  • Sep 24, 2011New AppVersion 1.0 in Tools for Free
Show more Show less

Developer information for HRTuning.com

HRTuning.com

peter@hrtuning.com

Website

N/A

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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.

Google Play Rankings for CR Calculator

This app is not ranked

Technologies used by CR Calculator

CR Calculator is requesting 10 permissions and is using 6 libraries.

Permissions

Network communication
view network connections, full network access
System tools
prevent phone from sleeping
Extra
android.permission.ACCESS_ADSERVICES_AD_ID, android.permission.ACCESS_ADSERVICES_ATTRIBUTION, android.permission.ACCESS_ADSERVICES_TOPICS, android.permission.FOREGROUND_SERVICE, com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE, com.google.android.gms.permission.AD_ID, com.linszter.hondacompcalc.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

Ad network libraries

AdMob Android Library IconAdMob

Social libraries

None found

Development tools

Android Jetpack core Android Library IconAndroid Jetpack core Android Architecture Components Android Library IconAndroid Architecture Components Firebase Android Library IconFirebase Google Cloud Messaging (GCM) Android Library IconGoogle Cloud Messaging (GCM)
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