MatrixCal is a web-based platform that combines private messaging and calendar planning in one place. Instead of endless chat histories, every calendar day has its own dedicated chat room. Messages, appointments, arrangements, and photos stay organized under the day they belong to.
MatrixCal is designed for private one-to-one conversations as well as groups, families, sports clubs, and teams.
The Problem with Traditional Messengers
Many messaging services require users to share their personal phone numbers or create accounts. This can affect privacy, expose users to unwanted contact, and make important information difficult to find in long chat histories.
MatrixCal offers an alternative: communication without traditional registration or phone numbers.
Key Features
- No registration required: No account, email address, password, or phone number needed. Simply use a nickname and avatar.
- Group and private chats: Communicate one-to-one or in closed groups.
- Daily chat rooms: Every calendar day has its own chat room, keeping conversations and plans organized.
- End-to-end encryption: Chat messages and media are encrypted directly on users’ devices for supported features.
- Access code and device approval: Users join a calendar with an access code. New devices must be approved by the calendar creator.
- Automatic message deletion: Choose between 24 hours, one week, one month, or permanent storage.
- Free voice calls: Make direct, encrypted browser-based calls using WebRTC, without sharing phone numbers.
- Works on all devices: Use MatrixCal as a web app (PWA) on iPhone, Android, tablets, and computers. No app store download required.
- Free to use: MatrixCal is free and supported by transparent advertising.
Who Is MatrixCal For?
- Families: Coordinate everyday activities and appointments without exchanging private phone numbers.
- Sports clubs and teams: Organize training sessions, matches, and attendance directly in the relevant daily chat.
- Friends and travel groups: Plan trips and activities together.
- Private conversations: Use access-controlled chats without traditional registration.
Our Mission
We want to make digital communication simpler, more organized, and more privacy-friendly. MatrixCal gives people more control over how they communicate and what personal information they share.
MatrixCal – Less personal data. More freedom in communication.
EU
Matrixcal.de 
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