Bausteine der BG BAU
v4.3.8 · 55.4 MB · code 40
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File information
UpdatedJan 31, 2026
PublishedMar 4, 2021
Packagede.bcverlag.bausteine
Versionv4.3.8 (40)
Size55.4 MB
MD55e3a7e0298c02d5c113baa4b118dc18f
Min SDK24
Malware scanTRUSTED
Signature SHA13D:F7:DC:F9:71:01:9C:C7:D4:08:98:22:00:C7:74:70:EE:E4:06:24
SignerCN=Andreas Staerkert, O=Deutscher Verkehrssicherheitsrat e.V., L=Bonn, ST=NRW, C=DE
Total downloads100,000
This version100,000
DeveloperComSoft Ltd.
Age ratingEveryone
What's new in v4.3.8
Version 4.3.7
Security scan
TRUSTED
- Developer signature verified 2026-01-31
- Signature SHA1 3D:F7:DC:F9:71:01:9C:C7:D4:08:98:22:00:C7:74:70:EE:E4:06:24
- File MD5 5e3a7e0298c02d5c113baa4b118dc18f
How to install Bausteine der BG BAU v4.3.8 on Android 7.0 Nougat+
Takes about 2 minutes. You'll need roughly 55.4 MB of free storage.
- Grab de.bcverlag.bausteine_40.apk — hit the Download button above (55.4 MB). If your browser warns about APK files, choose Keep or Download anyway — that warning fires on every APK, not just this one.
- Trust your browser to install — on Android 8+ go to Settings → Apps → Special access → Install unknown apps, pick the app you downloaded with (Chrome, Firefox, Files, etc.), and flip Allow from this source. On older Android, toggle Unknown sources under Security.
- (Optional) Verify the file — compute the MD5 of the downloaded APK and make sure it matches 5e3a7e0298c02d5c…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find de.bcverlag.bausteine_40.apk in your Files app under Downloads, then tap it. Android's package installer will appear.
- Check the signer — the install screen will name the publisher. For this build it should read CN=Andreas Staerkert, O=Deutscher Verkehrssicherheitsrat e.V., L=Bonn, ST=NRW, C=DE. If it doesn't match, cancel — you have the wrong file.
- Review permissions & tap Install — scroll the permission list, then confirm. If Play Protect flags it, tap Install anyway (this APK was scanned as TRUSTED).
- Done — open Bausteine der BG BAU — tap Open on the install screen, or find the Bausteine der BG BAU icon in your app drawer.
Common install errors for Bausteine der BG BAU
- "App not installed" — usually means an older or differently-signed version is already on your device. Uninstall it first, then retry. Your data may be lost unless you back it up.
- "Parse error" — the APK is for a newer Android than yours. This version needs Android 7.0 Nougat or later. Pick an older build from the versions list below.
- "There was a problem parsing the package" — the download was interrupted. Delete the file and re-download over Wi-Fi.