c3nav – 38C3 indoor navigation
v4.5.1 · 4.6 MB · code 14040501
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File information
UpdatedSep 19, 2025
PublishedSep 14, 2020
Packagede.c3nav.droid
Versionv4.5.1 (14040501)
Size4.6 MB
MD50336b4b1893b75adecbbd5f028ceafff
Min SDK14
Malware scanTRUSTED
Signature SHA102:9E:2F:3F:B1:79:B9:6E:DB:21:F9:4A:C6:9A:99:5E:D3:B6:18:8B
SignerCN=Raphael Michel, OU=Unknown, O=Unknown, L=Unknown, ST=Unknown, C=DE
Total downloads10,000
This version10,000
Developerc3nav
Age ratingEveryone
Security scan
TRUSTED
- Developer signature verified 2025-09-19
- Signature SHA1 02:9E:2F:3F:B1:79:B9:6E:DB:21:F9:4A:C6:9A:99:5E:D3:B6:18:8B
- File MD5 0336b4b1893b75adecbbd5f028ceafff
How to install c3nav – 38C3 indoor navigation v4.5.1 on Android API 14+
Takes about 2 minutes. You'll need roughly 4.6 MB of free storage.
- Grab de.c3nav.droid_14040501.apk — hit the Download button above (4.6 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 0336b4b1893b75ad…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find de.c3nav.droid_14040501.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=Raphael Michel, OU=Unknown, O=Unknown, L=Unknown, ST=Unknown, 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 c3nav – 38C3 indoor navigation — tap Open on the install screen, or find the c3nav – 38C3 indoor navigation icon in your app drawer.
Common install errors for c3nav – 38C3 indoor navigation
- "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 API 14 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.