MrBuggy Demo

Demo version of an app to learn software testing. Find and reproduce defects.

21CN Radosław Smilgin · pl.testingcup.mrbuggymobile

Not rated yet 1K+ downloads v1.3.013 18.7 MB Android 8.0+ PEGI 3 · Everyone

Download APK 18.7 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v1.3.013 (52)
Updated: Jul 30, 2026 (2 months ago)
APK size: 18.7 MB
Requires: Android 8.0+ (API 26)
CPU support: x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit
Category: Education (app)
Listed since: Oct 20, 2020 (at least)
Permissions: 6 (1 sensitive)
Website: mrbuggy.pl/mrbuggy8
Developer contact: [email protected]

About this APK

MrBuggy Demo is an app by 21CN Radosław Smilgin in the Education category, listed since at least October 2020. 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 1.3.009, the minimum Android version rose from 5.0 to 8.0. It asks for 6 permissions, 1 of them sensitive: read shared storage.

What's new in v1.3.013

3 tasks / 3 defects to find

Description

From the listing uploaded by “appupdater”.

Demo version. Take the role of a software tester and look for defects like a PRO. 3 defects are hidden in 3 tasks. Find them all! MrBuggy is a unique application prepared for TestingCup - Championship in Software Testing.

Version history

3 versions are listed, going back to v1.3.009. Since v1.3.011 it requires Android 8.0+.

v1.3.013 LATEST Jul 30, 2026 18.7 MB TRUSTED v1.3.011 Aug 27, 2025 18.7 MB UNKNOWN v1.3.009 May 18, 2024 10.2 MB UNKNOWN

All 3 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Jul 30, 2026.
Certificate issued to “21CN Rados?aw Smilgin” This is the certificate of the Google Play version.
Same certificate as the other version checked

Store checks and file details

Developer signature verified Jul 30, 2026
Validated against Google Play Jul 30, 2026
Signed byCN=Radoslaw Smilgin, OU=21 CN, O=21CN Rados?aw Smilgin, L=Pomorksie, ST=Gda?sk, C=48
Signing certificate (SHA-1)B2:A6:6C:29:0A:08:A5:04:80:52:51:53:A2:82:29:F1:C6:C0:6B:1E
File MD5ce29f26620e671436355b52d91ceb853
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 (6)

MrBuggy Demo requests 6 permissions, 1 of them sensitive.

Read shared storage Sensitive android.permission.READ_EXTERNAL_STORAGE
Full network access android.permission.INTERNET
Internal broadcast protection (app-defined) pl.testingcup.mrbuggymobile.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Run foreground services android.permission.FOREGROUND_SERVICE
Show notifications android.permission.POST_NOTIFICATIONS
View network connections android.permission.ACCESS_NETWORK_STATE

Required hardware & features

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

MrBuggy Demo APK: questions and answers

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 MrBuggy Demo 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 ce29f26620e671436355b52d91ceb853.