Tacendum — Private Messaging
End-to-end encrypted. Always.
About
This app offers end-to-end encrypted private messaging, rooms, and calls without requiring any personal sign-up information. It prioritizes user privacy with features like disappearing messages and screenshot notifications.
What's New in Tacendum
1.1
October 7, 2026
A new look for Tacendum, on iPhone and iPad. • White screens, charcoal text and one forest green. Dark mode is now a neutral charcoal. • Name circles for people without a photo are now solid forest green with white initials, and so are group icons. • Chats are now called rooms, and your list is called Rooms. Tap + to open a room with someone, or tap New group to start a group. • Open a room is redesigned. One field takes their Tacendum ID, or the username or email of someone who chose to be found. Scan sits just below it for QR codes, and My ID is one tap away when someone needs yours. This update also brings the fixes and improvements from recent builds.
MoreFAQ
Does Tacendum have ads?
No, Tacendum is ad-free. The app description explicitly states 'No ads, no trackers.'
How does Tacendum handle privacy?
Tacendum uses end-to-end encryption with the Signal protocol for all communications. It requires no personal sign-up information, has no directory, and offers features like disappearing messages and screenshot disclosures to enhance user privacy.
What devices is Tacendum available on?
Tacendum is available for iPhone, iPad, and iPod devices.
How do I add contacts in Tacendum?
You can add contacts by scanning a code in person, or optionally linking an email or username in Settings to enable findability. There is no automatic contact upload or directory.
Can I recover lost messages or keys in Tacendum?
No, message and key recovery is not possible by design. The encryption key never leaves your phone, meaning if you lose your device, your message history cannot be recovered.
What is the age rating for Tacendum?
Tacendum has an age rating of 17+, indicating it is intended for mature audiences.
How often is Tacendum updated?
The app was last updated on October 7, 2026, with version 1.1. This suggests a relatively recent update, though the frequency of future updates is not specified.
What is the app lock feature in Tacendum?
Tacendum offers an app lock with a passcode that is separate from your phone's lock. It includes an auto-lock delay and a decoy option where entering the code backward opens a fake set of conversations.