Threema OnPrem. Self-Hosted
v6.4.0o · 43.9 MB · code 9001136
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File information
UpdatedApr 8, 2026
PublishedNov 15, 2025
Packagech.threema.app.onprem
Versionv6.4.0o (9001136)
Size43.9 MB
MD53bd4914caba900f5b36ffb883e52d34a
Min SDK24
ABIsx86-64
Malware scanTRUSTED
Signature SHA18E:7C:71:6C:9C:90:15:F9:17:FC:B5:E7:68:B8:09:82:FA:E4:9A:60
SignerCN=Threema GmbH, O=Threema GmbH, L=Pfaeffikon, ST=SZ, C=CH
Total downloads10,000
This version10,000
DeveloperThreema GmbH
Age ratingEveryone
What's new in v6.4.0o
- Technical and visual overhaul of the chat overview
- The master key is now additionally protected by the Android Keystore system
- Various under-the-hood improvements and bug fixes
- The master key is now additionally protected by the Android Keystore system
- Various under-the-hood improvements and bug fixes
Security scan
TRUSTED
- Developer signature verified 2026-04-08
- Signature SHA1 8E:7C:71:6C:9C:90:15:F9:17:FC:B5:E7:68:B8:09:82:FA:E4:9A:60
- File MD5 3bd4914caba900f5b36ffb883e52d34a
How to install Threema OnPrem. Self-Hosted v6.4.0o on Android 7.0 Nougat+
Takes about 2 minutes. You'll need roughly 43.9 MB of free storage.
- Grab ch.threema.app.onprem_9001136.apk — hit the Download button above (43.9 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 3bd4914caba900f5…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find ch.threema.app.onprem_9001136.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=Threema GmbH, O=Threema GmbH, L=Pfaeffikon, ST=SZ, C=CH. 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 Threema OnPrem. Self-Hosted — tap Open on the install screen, or find the Threema OnPrem. Self-Hosted icon in your app drawer (this build targets x86-64 devices).
Common install errors for Threema OnPrem. Self-Hosted
- "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.