SimpleX Chat - e2e encrypted messenger without any user IDs - private by design!
About this app
SimpleX - the first messaging platform that has no user identifiers, not even random numbers! Security assessment was done by Trail of Bits in November 2022.
SimpleX Chat features:
• end-to-end encrypted messages, with editing, replies and deletion of messages.
• sending end-to-end encrypted images and files.
• single-use and long-term user addresses.
• secret chat groups - only group members know it exists and who is the member.
• end-to-end encrypted audio and video calls.
• private instant notifications.
• portable chat profile - you can transfer your chat contacts and history to another device (terminal or mobile).
SimpleX Chat advantages:
• Full privacy of your identity, profile, contacts and metadata: unlike any other existing messaging platform, SimpleX uses no phone numbers or any other identifiers assigned to the users - not even random numbers. This protects the privacy of who you are communicating with, hiding it from SimpleX platform servers and from any observers.
• Complete protection against spam and abuse: as you have no identifier on SimpleX platform, you cannot be contacted unless you share a one-time invitation link or an optional temporary user address.
• Full ownership, control and security of your data: SimpleX stores all user data on client devices, the messages are only held temporarily on SimpleX relay servers until they are received.
• Decentralized network: you can use SimpleX with your own servers and still communicate with people using the servers that are pre-configured in the apps or any other SimpleX servers.
You can connect to anybody you know via link or scan QR code (in the video call or in person) and start sending messages instantly - no emails, phone numbers or passwords needed.
Your profile and contacts are only stored in the app on your device - our servers do not have access to this information.
All messages are end-to-end encrypted using open-source double-ratchet protocol; the messages are routed via our servers using open-source SimpleX Messaging Protocol.
Please send us any questions via the app (connect to the team via settings!), email us or submit an issue on GitHub.
Follow us on Mastodon (@simplex@mastodon.social), Twitter (@SimpleXChat) and Reddit (r/SimpleXChat) for the latest updates.
Once you install SimpleX Chat, join the group of users via this link to share your ideas and feedback.
Licensed under AGPL-3.0-or-later.
What's New in v6.5.6
Imported from the F-Droid repository index.
Version history
Jun 24, 2026 · 80.7 MB · Android API 26–35 · code 359
Imported from the F-Droid repository index.
SHA-256 d030454d6e0ed3d4ca14bd512aa5f5a95687055df55f2542a52acb5ce34ef088
Jun 24, 2026 · 91.5 MB · Android API 26–35 · code 358
Imported from the F-Droid repository index.
SHA-256 1909bf9d7ea0c82497dc25c20ca155d971572fc9adb7a121f53759b243faf732
Jun 20, 2026 · 80.8 MB · Android API 26–35 · code 356
Imported from the F-Droid repository index.
SHA-256 8c8c9807cde0002de2a50d445aa8afc2d55fc7eb45b6783501cca7d9eb7e36e0
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 chat.simplex.app 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, 6.5.6 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall SimpleX Chat 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 SimpleX Chat, and a listing is removed when the evidence for it stops holding up.
Get SimpleX Chat
Every source we list for chat.simplex.app 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
d030454d6e0ed3d4ca14bd512aa5f5a95687055df55f2542a52acb5ce34ef088
Signing certificate
aec195dcfd4614bd3a91ec26d1d514c87571c5cc8dcf48083f9283143ca2b9a6
Permissions Required
What each permission lets SimpleX Chat do. A highlighted one is worth a second look — not necessarily wrong, just worth asking whether this app needs it.
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.
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