iPhone Screenshots


ySign – Decentralized Messenger

ySign is a truly decentralized messaging app based on blockchain technology, with complete anonymity, privacy and security.

Exchanging information has never been easier and more secure! ySign ensures security and privacy during the exchange of messages and calls. Encrypted Peer-to-Peer communication enables users to freely and securely communicate with each other without any of their personal data being at risk.
A copy of your private messages and calls will only be saved on your own device.

We don’t need your private information! The only thing you have to do is generate an “ID key” and create a password. ID keys are exclusively owned by the users.
ySign was made for you to interact safely with friends and family.
Make your life private again with ySign!


Decentralized Chat
Peer-to-peer encrypted conversations. A copy of your messages are stored only on your device.

Make and receive free p2p calls. Talk to your friends or colleagues while knowing that no data will be shared with third parties. All calls are decentralized and cannot be stored in any way.

Store, send and receive your cryptocurrencies on the integrated ySign Wallet.


- Generate an ID Key and create a password. We don’t need your personal data.
- Find others with the first 6 characters of their ID Key
- Add them to your contacts list
- Start chatting on ySign while knowing that no data will be shared with third parties.
- Create a Wallet and start sending and receiving cryptocurrency.

Contact us
We are always looking for feedback. If you notice any bugs, have any suggestions, or have any questions for the team, contact us at support@ysign.app.

What’s New

Version 1.3.1

Display of image and file sent in the chat

App Privacy

The developer, First Media Advance AG, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Identifiers

Privacy practices may vary based on, for example, the features you use or your age. Learn More


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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