Messenger for secured chats and groups (end-to-end encrypted)
About this app
Dib2Qm (aka Dibdib Messenger)
Messenger for secured chats and groups (end-to-end encrypted).
Dib2Qm was (!) a messenger that works via e-mail servers, end-to-end encrypted.
- Deprecated. - Please do not use this app any longer, unless you have a very specific need. - If so, please get in touch with gxworks at mail . de. - Otherwise, use such apps as deltaChat, SimpleX etc. - (Why? This app was a proof-of-concept that turned out to be useful ...) - (... useful - as long as no other similar app provided for those needs) - (... which is, fortunately, no longer the case)
Licensed under GPL-3.0-or-later.
What's New in v0.24.30
Imported from the F-Droid repository index.
- - Deprecated.
- - Please do not use this app any longer, unless you have a very specific need.
- - If so, please get in touch with gxworks at mail . de.
- - Otherwise, use such apps as deltaChat, SimpleX etc.
- - (Why? This app was a proof-of-concept that turned out to be useful ...)
- - (... useful - as long as no other similar app provided for those needs)
Version history
Dec 2, 2025 · 3.7 MB · Android API 21–29 · code 2430
Imported from the F-Droid repository index.
- - Deprecated.
- - Please do not use this app any longer, unless you have a very specific need.
- - If so, please get in touch with gxworks at mail . de.
- - Otherwise, use such apps as deltaChat, SimpleX etc.
- - (Why? This app was a proof-of-concept that turned out to be useful ...)
- - (... useful - as long as no other similar app provided for those needs)
SHA-256 4ee1bdf6fad40425b7354b918cad836ca1df1febbd7061e8adfe94ca7c0e405a
Mar 23, 2025 · 3.7 MB · Android API 21–29 · code 2428
Imported from the F-Droid repository index.
- - Transitional version, not intended for new installations.
- - Use this only if needed and, as far as possible, only as update.
- - Necessary changes have to be delayed, unfortunately.
SHA-256 8ace1ef4718b4986350a969e3a9008c01ac70e8cf2ad18f5d28654afc892c4c4
Jun 12, 2024 · 3.7 MB · Android API 21–29 · code 2422
Imported from the F-Droid repository index.
- - Experimental (!) version with transitional appearance -- not nice :-( ...
- - ... not nice, but it works on newer versions of Android, and also on PCs.
- - Cmp. gitlab.com/gxworks/dib2qm !
- - If you are not sure, keep using the former version.
- - Anyway, do make use of the backup function for saving your chats.
SHA-256 1100ec96323b07c5ffb337524ed2ac36b1b82745c716d90d03099cce1ec6af56
Will it run on your device?
73%
- Runs on a broad range of modern Android versions.
- ABI coverage is focused on newer 64-bit devices.
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 net.sourceforge.dibdib.android.dib2qm 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, 0.24.28 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Dib2Qm 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 Dib2Qm, and a listing is removed when the evidence for it stops holding up.
Get Dib2Qm
Every source we list for net.sourceforge.dibdib.android.dib2qm 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
4ee1bdf6fad40425b7354b918cad836ca1df1febbd7061e8adfe94ca7c0e405a
Signing certificate
908a067183ca222f8998b1df280ab3f3d0cd358603c0b64756f776395958967e
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.