R1+R2 Zs Ze Calculator

Calculate and convert to or from R1+R2, Zs and Ze

Pro Certs Software Ltd · com.procerts.r1r2calculator

Not rated yet 10K+ downloads v4.3.7 6.2 MB Android 7.0+ PEGI 3 · Everyone

Download APK 6.2 MB All versions

Signature matches the Google Play version Details

Watch the R1+R2 Zs Ze Calculator trailer on YouTube

At a glance

Latest version: v4.3.7 (40307)
Updated: Dec 7, 2025 (10 months ago)
APK size: 6.2 MB
Requires: Android 7.0+ (API 24)
CPU support: Any (no native code)
Category: Tools (app)
Listed since: Nov 12, 2021 (at least)
Permissions: 9
Website: procertssoftware.com
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

R1+R2 Zs Ze Calculator is an app by Pro Certs Software Ltd in the Tools category, listed since at least November 2021. It has no native code, so it runs on any Android processor.

Since version 4.3.6, the minimum Android version rose from 6.0 to 7.0. It asks for 9 permissions, none of them sensitive. It asks for the same permissions as version 4.3.6. The app can read the advertising ID that ad and analytics services use.

What's new in v4.3.7

25/07/2025 v4.3.7 - Android 35 update. - Some small UI updates.

Description

From the listing uploaded by “appupdater”.

R1+R2 Zs Ze converter for Android devices. Easily calculate the earth loop impedance (Zs) from the R1+R2 and Ze values, also calculate the R1+R2 value from the Zs and Ze values. A handy app for checking & verifying measured values or for calculating a value from the other two known values. Enter any two known values to calculate the other. R1+R2 Zs Ze Features: Calculate and convert to or from any of the following = Zs = R1+R2 = Ze Although this app allows the calculation of the Ze, the Ze should not be calculated, the Ze value should be obtained by actual measurement or by inquiry to the regional electric company. It is best practice to directly measure the R1+R2 and Zs values . How to use: 1) Enter ANY two values to calculate the other 2) Press calculate Check out our full collection of electrical apps for Android in the Play Store.

Version history

2 versions are listed, going back to v4.3.6. Since v4.3.7 it requires Android 7.0+.

v4.3.7 LATEST Dec 7, 2025 6.2 MB TRUSTED v4.3.6 Sep 25, 2024 6 MB TRUSTED

All 2 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Dec 7, 2025.
Certificate issued to “Pro Certs Software Ltd” This is the certificate of the Google Play version.
Same certificate as the other version checked

Store checks and file details

Developer signature verified Dec 7, 2025
Validated against Google Play Dec 7, 2025
Signed byCN=Gary Lince, O=Pro Certs Software Ltd, C=GB
Signing certificate (SHA-1)AD:9B:FE:0C:E9:2E:0A:37:F1:C7:E1:66:CD:74:0F:85:CC:3C:B5:FD
File MD5664d89edfd702206fcd867e524d10170
Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (1 other version compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (9)

R1+R2 Zs Ze Calculator requests 9 permissions, none of them sensitive.

Access adservices ad id android.permission.ACCESS_ADSERVICES_AD_ID
Access adservices attribution android.permission.ACCESS_ADSERVICES_ATTRIBUTION
Access adservices topics android.permission.ACCESS_ADSERVICES_TOPICS
Advertising ID com.google.android.gms.permission.AD_ID
Full network access android.permission.INTERNET
Internal broadcast protection (app-defined) com.procerts.r1r2calculator.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Prevent the device from sleeping android.permission.WAKE_LOCK
Run foreground services android.permission.FOREGROUND_SERVICE
View network connections android.permission.ACCESS_NETWORK_STATE

Required hardware & features

Basic touch input android.hardware.faketouch
Portrait screen android.hardware.screen.portrait

R1+R2 Zs Ze Calculator APK: questions and answers

Is there a version of R1+R2 Zs Ze Calculator for older Android phones?

The current version needs Android 7.0 or later. Version 4.3.6 is the newest listed build that installs on Android 6.0 and later. It is an old build: apps that rely on online services may no longer connect when they are this old. Get version 4.3.6 · All versions

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is the R1+R2 Zs Ze Calculator APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the other version checked. After downloading, check that the file's MD5 is 664d89edfd702206fcd867e524d10170.