KYOJO: No Internet Message app

About KYOJO: No Internet Message app

KYOJO is an app that allows you to chat by communicating directly with nearby users even without an internet connection.
By adopting P2P (peer-to-peer) communication that does not go through a server, privacy is protected, and it can be used in times of disaster or in places where cellular signal is unavailable.

[Origin]
In Japan, there are concepts of Self-help (自助[Ji-jo]), Public-help (公助[Ko-jo]), and Mutual-help (共助[Kyo-jo]) during disasters.
Mutual-help means people helping each other, and this app is designed with the hope of supporting those activities.

[Key Features]
- No Server Access Required: Messages are sent and received directly between devices without passing through a server.
- Local Data Storage Only: Your profile and chat history are stored only on your device.
- Anonymity: No troublesome registration or phone number authentication required. Just set a username and start chatting.
- Group & Private Chat: Supports both group conversations with everyone around you and secure 1-on-1 talks.

[Recommended for]
- Emergency situations or network outages where the internet is unavailable.
- Communication in places without cellular signal, such as campsites or airplanes.
- Privacy-conscious users who prefer conversations not to be stored on servers.
- Connecting with people nearby at event venues, conferences, or festivals.

[Important Notes]
- The maximum communication range is approximately 30 meters in an unobstructed environment.
- Uninstalling the app will permanently delete all history and profile data.
- Requires Bluetooth and Location permissions for device discovery.