Indoor navigation for the Chaos Communication Congress
About this app
This is the official Android app for c3nav, the map & indoor navigation software at the Chaos Communication Congress which you can find at c3nav.de.
With this app, you get to use c3nav with native Android features, including:
* Easier navigation * WiFi-based location * Sharing locations * Creating location shortcuts on your home screen
Licensed under Apache-2.0.
What's New in v4.7.0
Imported from the F-Droid repository index.
Version history
Dec 27, 2025 · 4.6 MB · Android API 18–35 · code 18040700
Imported from the F-Droid repository index.
SHA-256 482e5c9b9746f352d616597f3f689d47614ff600662e61b8e9f7f8e36bb0125d
Jan 2, 2025 · 4.6 MB · Android API 14–34 · code 14040501
Imported from the F-Droid repository index.
SHA-256 b1f264583067e125c736a92255010bac24f68638e1713ba356d4addf6ff5c85b
Apr 1, 2024 · 3.8 MB · Android API 14–34 · code 14040302
Imported from the F-Droid repository index.
SHA-256 46e212f92ea8150ca305ea0ad384763ea62a40371c845aa242a4d05a055ccf00
Will it run on your device?
78%
- Runs on a broad range of modern Android versions.
- ABI coverage is focused on newer 64-bit devices.
- Aligned with the latest Android target SDK expectations.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be de.c3nav.droid is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 4.5.1 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall c3nav first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of c3nav, and a listing is removed when the evidence for it stops holding up.
Get c3nav
Every source we list for de.c3nav.droid is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
482e5c9b9746f352d616597f3f689d47614ff600662e61b8e9f7f8e36bb0125d
Signing certificate
db5c285800645cee478e4ed0f7f76cd54fa801949b63dbbae22d7b4e57483ef4
Permissions Required
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
Report a problem with this listing
A listing is only as good as its corrections. If a source is broken, a signature looks wrong, or this app should not be here, tell the moderation team.