Bausteine der BG BAU v4.3.6
APK · 53.5 MB · version code 35 · Android 4.4+ · uploaded Dec 28, 2025
- Signature matches the Google Play version 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 v4.3.8, uploaded Sep 17, 2026 — about 9 months after this one.
- Size: this file is 53.5 MB; the latest is 55.4 MB (2 MB larger).
- Android: this version needs Android 4.4+; the latest needs Android 7.0+. Use this one if your device runs an older Android release.
- The latest version asks for 1 more permission: Internal broadcast protection (app-defined).
File information
- Version
- v4.3.6 (35)
- Uploaded
- Dec 28, 2025
- Size
- 53.5 MB
- Requires
- Android 4.4+ (API 19)
- CPU support
- Any (no native code)
- Screen
- Small screens and larger
- MD5
- 67d559a0cfb65bad914755c23769778a
- Signing certificate (SHA-1)
- 3D:F7:DC:F9:71:01:9C:C7:D4:08:98:22:00:C7:74:70:EE:E4:06:24
- Signed by
- CN=Andreas Staerkert, O=Deutscher Verkehrssicherheitsrat e.V., L=Bonn, ST=NRW, C=DE
- File name
- de-bcverlag-bausteine-35-72952630-67d559a0cfb65bad914755c23769778a.apk
- Package
- de.bcverlag.bausteine
- Downloads (all versions)
- 100K+
- Age rating
- PEGI 3 · Everyone
What's new in v4.3.6
Version 4.3.5
Permissions (1)
This version requests 1 permission, none of them sensitive.
- Full network access android.permission.INTERNET
Security & authenticity
Security rating: Trusted
Signing certificate
- Signature matches the Google Play version Checked by the source store on Dec 28, 2025.
- Certificate issued to “Deutscher Verkehrssicherheitsrat e.V.” This is the certificate of the Google Play version.
- Same certificate as the 2 other versions checked
Store checks
- Developer signature verified Dec 28, 2025
- Validated against Google Play Dec 28, 2025
- Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020
Scans 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.
How to install Bausteine der BG BAU on Android 4.4+
You'll need about 106.9 MB of free space.
- Download the APK — tap Download APK above (53.5 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 de-bcverlag-bausteine-35-72952630-67d559a0cfb65bad914755c23769778a.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 67d559a0cfb65bad914755c23769778a. 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 Bausteine der BG BAU — 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 4.4+). 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.