SimpleX Chat

SimpleX Chat

About this app

SimpleX - the first messaging platform that has no user identifiers of any kind - 100% private by design!

Security assessment by Trail of Bits: https://simplex.chat/blog/20221108-simplex-chat-v4.2-security-audit-new-website.html

SimpleX Chat features:
- end-to-end encrypted messages, with editing, replies and deletion.
- disappearing messages with opt-out per contact/group.
- NEW message reactions.
- NEW delivery receipts, with opt-out per contact.
- multiple chat profiles, with hidden profiles.
- app access and self-destruct passcodes.
- incognito mode - unique to SimpleX Chat.
- sending end-to-end encrypted images and files.
- voice messages up to 5 minutes – also end-to-end encrypted.
- "live" messages – they update for all recipients as you type them, every few seconds - unique to SimpleX Chat.
- 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.
- connection security code verification, for contacts and group members – to protect from man-in-the-middle attacks (e.g. invitation link substitution).
- private instant notifications.
- encrypted portable chat database - you can transfer your chat contacts and history to another device.
- animated images and "stickers" (e.g., from GIF and PNG files and from 3rd party keyboards).

SimpleX Chat advantages:
- 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 proxied peer-to-peer network: you can use SimpleX Chat via your own relay servers and still communicate with people using pre-configured or any other SimpleX relay servers.
- fully open-source code.

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 - relay servers do not have access to this information.

All messages are end-to-end encrypted using open-source double-ratchet protocol; the messages are delivered via relay servers using open-source SimpleX Messaging Protocol.

Please send us any questions via the app (connect to the team via the app settings!), email [e-mail] or submit issues on GitHub (https://github.com/simplex-chat/simplex-chat/issues)

Ream more about SimpleX Chat at https://simplex.chat

Get source code in our GitHub repo: https://github.com/simplex-chat/simplex-chat

Follow us on Reddit (r/SimpleXChat/), Twitter (@SimpleXChat) and Mastodon (https://mastodon.social/@simplex) for the latest updates.

Ratings and reviews

***please consider the ability to have in chat/conversation notification sound. A sound while you're chatting and you receive a message. Great app. Easy to get started, and works! Love that it works perfectly without google (play services/cloud messaging). It does use a bit more battery than I'd like. The two biggest things: better battery usage and in chat/convo notification sounds. Thank you for everything you guys are doing. Keep it up

This app may or may not work if you have Android 8 (minimum requirement). For me it keeps crashing immediately when I try to open it, and I've sent in a crash reports after updates. However I like the concept of the app, and hopefully it'll be fully functional on all Android 8 devices at some point.

1- Please add the feature of (typing...) when the other person types. It causes misunderstanding and awkward silence when we don't know who's typing or who's not. 2- the back camera toggle on video call is not working. Please fix this issue. 3- please add the ability to move the small screen of (our own) video to any direction. (In video call) 4- please add the ability to mirror the video in video call cause it's weird as it's opposite to what we see.

What's new

New in v5.6.1:
- many fixes.
- reduced memory usage.

New in v5.6:
- quantum resistant end-to-end encryption (see the blog post).
- migrate app data to another device (see the blog post).
- use the app during the audio and video calls.
- admin can block a member for all members.
- faster leaving and deleting groups.
- filtering chats excludes muted chats.

Read more: https://simplex.chat/blog/20240323-simplex-network-privacy-non-profit-v5-6-quantum-resistant-e2e-encryption-simple-migration.html