RC Circuit

List R, C making desire time constant / cutoff frequency

Peter Ho · com.peterhohsy.rccircuit

Not rated yet 10K+ downloads v3.0.20 7.4 MB Android 6.0+ PEGI 3 · Everyone

Download APK 7.4 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v3.0.20 (3020)
Updated: Jul 27, 2026 (2 months ago)
APK size: 7.4 MB
Requires: Android 6.0+ (API 23)
CPU support: x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit
Category: Tools (app)
Listed since: Jul 14, 2021 (at least)
Permissions: 4
Developer contact: [email protected]

About this APK

RC Circuit is an app by Peter Ho in the Tools category, listed since at least July 2021. It includes native code for x86 32-bit, x86 64-bit, ARM 32-bit and ARM 64-bit, so it runs on practically every phone.

Since version 2.8.40, the minimum Android version rose from 4.0 to 6.0. It asks for 4 permissions, none of them sensitive. It asks for the same permissions as version 3.0.15. The app offers in-app purchases through Google Play.

What's new in v3.0.20

3.0.20 - Fix minor bugs

Description

From the listing uploaded by “appupdater”.

This app is used to calculate the RC charging circuit and RC filter. It is suitable for hobbyist or electronic engineers. Features: 1. Calculate time constant by R and C 2. Calculate between time constant and % of charging 3. Calculate cutoff frequency of low-pass filter/ high-pass filter by resistor and capacitor values 4. To find out combinations of resistance and capacitance making a desired time constant 5. To find out combinations of resistance and capacitance making a desired cutoff frequency 6. Save all combinations in a CSV (Excel) file Features in PRO version only: 1. No Ads 2. No limitation Note : 1. For those who need support please email to the designated email. Do NOT use either the feedback area to write questions, it is not appropriate and that is not guaranteed that can read them.

Version history

4 versions are listed, going back to v2.8.40. Since v3.0.20 it requires Android 6.0+.

v3.0.20 LATEST Jul 27, 2026 7.4 MB TRUSTED v3.0.15 Mar 18, 2026 4 MB TRUSTED v3.0.10 Feb 1, 2026 4 MB TRUSTED v2.8.40 Mar 21, 2024 2.5 MB TRUSTED

All 4 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Jul 27, 2026.
Certificate issued to “Peter Ho” This is the certificate of the Google Play version.
Same certificate as the 2 other versions checked

Store checks and file details

Developer signature verified Jul 27, 2026
Validated against Google Play Jul 27, 2026
Signed byCN=Peter Ho
Signing certificate (SHA-1)41:02:A5:4E:EF:CC:4A:31:97:6A:CF:74:8A:ED:A1:D6:58:A7:02:DC
File MD5307cb3afe441e8726b5e96f86a371421
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 (2 other versions compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (4)

RC Circuit requests 4 permissions, none of them sensitive.

Full network access android.permission.INTERNET
In-app purchases (Google Play Billing) com.android.vending.BILLING
Internal broadcast protection (app-defined) com.peterhohsy.rccircuit.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
View network connections android.permission.ACCESS_NETWORK_STATE

Required hardware & features

Basic touch input android.hardware.faketouch

RC Circuit APK: questions and answers

Is there a version of RC Circuit for older Android phones?

The current version needs Android 6.0 or later. Version 3.0.15 is the newest listed build that installs on Android 5.0 and later. Get version 3.0.15 · 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 RC Circuit free?

The APK is free to download, but the app offers in-app purchases through Google Play.

Is the RC Circuit 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 2 other versions checked. After downloading, check that the file's MD5 is 307cb3afe441e8726b5e96f86a371421.