What is TuyJo?
TuyJo is a completely private and secure messaging app, designed exclusively for couples. Thanks to advanced end-to-end encryption (RSA-2048 + AES-256), only you and your partner can read your messages. Not even we can access them!
✨ Main Features
💬 Secure Chat
End-to-end encrypted messages, read receipts, typing indicators, and much more.
📎 Protected Attachments
Send photos, videos, and documents fully encrypted with integrated viewer.
📅 TODOs & Reminders
Create shared reminders with automatic notifications 1 hour before events.
📆 TODO Calendar
View all your TODOs on an interactive calendar with date ranges.
💑 Couple Selfie
A shared profile picture that automatically syncs between your devices.
🖼️ Media Gallery
All photos, videos, and documents in a convenient 3x3 grid always available.
🔐 Maximum Security
Your privacy is our priority. We use double encryption with RSA-2048 for key exchange and AES-256 for messages. Each message has a unique key and nobody, not even the server, can read your content.
🚀 How Does It Work?
1. Initial Pairing (QR Code)
- Device A generates its cryptographic keys and shows a QR code
- Device B scans the QR code and imports A's public key
- Device B shows its QR code with its own public key
- Device A scans B's QR code and completes the pairing
- Both devices are now securely connected! 🎉
2. Sending Encrypted Messages
- Write your message in the app
- The app generates a unique random AES-256 key for that message
- The message is encrypted with AES-256
- The AES key is encrypted TWICE:
- Once with your public key (for you)
- Once with your partner's public key (for them)
- The encrypted message and keys are saved to the cloud
- Only you and your partner can decrypt and read the message!
3. TODOs with Automatic Reminders
- Create a TODO with date and time from the app
- The app automatically sends a scheduled reminder
- 1 hour before the event, both of you will receive a notification
- Complete the TODO with a simple long press!
💪 Why Choose TuyJo?
- Total Privacy: End-to-end encryption with zero-knowledge architecture
- Fast: Local cache for instant loading (< 100ms)
- Complete: Chat, attachments, TODOs, calendar, notifications, and more
- Modern: Clean design with purple/white theme and smooth animations
- Reliable: Serverless backend on Firebase, always available
- Just for You Two: Designed specifically for couples, not for groups
🎯 Current Version: 1.11.0
What's new in January 2026:
• Integrated TODO calendar with date ranges
• Attachments for TODOs (photos and documents)
• Improved reusable widgets
• Conversational date separators ("Today", "Yesterday")
• Optimized performance for media scrolling
🛠️ Technology
📱 Availability
TuyJo is available for iOS and Android. The app is designed to work perfectly on modern smartphones with an interface optimized for mobile devices.