On July 28, Jack Dorsey introduced Bitchat Mesh, an open-source messaging application available for free in Apple's App Store. The app features a minimalist design and transmits messages exclusively via Bluetooth, establishing a mesh network for connectivity without relying on phone numbers or internet access. Users can communicate with nearby devices and extend their network reach through a series of connections. Each device acts as both a client and a server, and messages sent in the main chat are visible to all users within the network, while private messaging is available for one-on-one conversations. Additional features include the ability to send private messages, block users, and engage in playful interactions, with notifications for screenshots taken during conversations. Although the app is open-source, raising transparency about its code, Dorsey issued a security warning highlighting that it has not undergone external security reviews and may contain vulnerabilities.