Chain Reaction v2.9
APK · 5.1 MB · version code 29 · Android 5.0+ · uploaded Feb 6, 2026
- Same certificate as v2.0, which matches Google Play Details
Quick check before downloading
Answer this to unlock the download. It keeps automated downloaders away.
Compared with the latest version
The latest version is v3.10.2, uploaded Feb 15, 2026 — about 8 days after this one.
- Size: this file is 5.1 MB; the latest is 5.6 MB (584.9 KB larger).
- The latest version asks for 4 more permissions: Bluetooth advertise, Bluetooth connect, Bluetooth scan, Nearby wifi devices.
File information
- Version
- v2.9 (29)
- Uploaded
- Feb 6, 2026
- Size
- 5.1 MB
- Requires
- Android 5.0+ (API 21)
- CPU support
- Any (no native code)
- Screen
- Small screens and larger
- MD5
- 4ae7bfa94a42f574156b917a618dc4cd
- Signing certificate (SHA-1)
- 5B:4E:4E:C1:CE:2D:15:2A:D5:3D:48:E7:1C:68:BB:D9:4C:E6:CE:4C
- Signed by
- CN=Matthew Gray, OU=Development, O=Buddy-Matt Entertainment, L=Chippenham, ST=Wiltshire, C=GB
- File name
- com-buddymattent-chainreaction-29-73465023-4ae7bfa94a42f574156b917a618dc4cd.apk
- Package
- com.BuddyMattEnt.ChainReaction
- Downloads (all versions)
- 10M+
- Age rating
- PEGI 3 · Everyone
What's new in v2.9
Fullscreen/insets fixes for better screen fit + touch alignment; main menu now supports system dark mode; CPU (medium/hard) tweaked to avoid repetitive corner moves.
Permissions (9)
This version 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
- Control vibration android.permission.VIBRATE
- Full network access android.permission.INTERNET
- Prevent the device from sleeping android.permission.WAKE_LOCK
- Run foreground services android.permission.FOREGROUND_SERVICE
- View network connections android.permission.ACCESS_NETWORK_STATE
Security & authenticity
Security rating: Trusted
Signing certificate
- Certificate issued to “Buddy-Matt Entertainment” This is the certificate of the Google Play version.
- Same certificate as v2.0, which matches Google Play v2.0
Store checks
- Developer signature verified Feb 6, 2026
- Uploaded by “catappult” Platinum tier · 1,377 followers · uploading since 2018
Scans come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (5 other versions compared). AAPKs doesn't scan files itself.
How to install Chain Reaction on Android 5.0+
You'll need about 10.1 MB of free space.
- Download the APK — tap Download APK above (5.1 MB). Chrome shows “File might be harmful” for every APK file; choose Download anyway only if you trust this file.
- Open the file — tap the download notification, or open Files › Downloads and tap com-buddymattent-chainreaction-29-73465023-4ae7bfa94a42f574156b917a618dc4cd.apk.
- Allow the install (first time only) — Android 8 and later asks for permission the first time an app opens an APK: tap Settings in the prompt, turn on Allow from this source, then go back. Manual path: Settings › Apps › Special app access › Install unknown apps (on Samsung: Settings › Apps › ⋮ › Special access). On Android 7 and older: Settings › Security › Unknown sources.
- Check the file (optional) — the MD5 of the downloaded file should be 4ae7bfa94a42f574156b917a618dc4cd. If it differs, the file is damaged or was changed: delete it and download again.
- Tap Install — Android asks “Do you want to install this app?”. If Google Play Protect shows a warning, read it before you continue: the source store rated this file Trusted, but only install apps from sources you trust. If an earlier version is installed, this one only installs as an update when it is signed with the same certificate (SHA-1 shown above).
- Open Chain Reaction — tap Open on the install screen, or find it in your app drawer.
Common install problems
- “App not installed” — a version signed with a different certificate, or a newer version, is already installed (Android doesn't allow downgrades). Uninstall it first; back up your data, because uninstalling deletes it.
- “There was a problem parsing the package” — the file is incomplete, or your Android is too old (this version needs Android 5.0+). Download it again, or pick an older version.
- Blocked by Play Protect — Play Protect checks apps from outside the Play Store. Only continue if you trust the source.