Twitter co-founder Jack Dorsey developed Bitchat, a privacy-focused messaging app that works offline via Bluetooth without requiring email, phone numbers or personal data.

07-15-2025 TECH Jack Dorsey’s new Sun Day app tells you exactly how long to tan before you burn The Twitter cofounder’s latest wellness app tracks your UV exposure and vitamin D intake.

He previously worked at Android Police and Tech Advisor. Twitter co-founder Jack Dorsey has released a new app that tracks your sun exposure and vitamin D levels.

Twitter co-founder Jack Dorsey's new app, called Sun Day, ostensibly helps users track UV exposure and vitamin D intake.

Jack Dorsey is shipping. On Sunday, the Twitter co-founder shared a link on X (formerly Twitter) to a new app called Sun Day, which he claims helps users track their vitamin D intake. It’s the ...

A new app called BitChat is offering a different way to chat, no internet or SIM card needed. This fresh idea comes from Jack Dorsey, the co-founder of Twitter. Unlike popular apps like WhatsApp ...

Twitter/X co-founder Jack Dorsey has launched Bitchat, a surprising new messaging app that works completely offline using Bluetooth Low Energy. No WiFi, mobile data, or login required — Bitchat ...

Dorsey admitted that his new messaging app had not been reviewed or tested for security issues prior to its launch.

What to know: Jack Dorsey has published a whitepaper for Bitchat, a decentralized messaging protocol that enables fully encrypted communication - without the internet.

The co-founder of Twitter, Jack Dorsey, announced the launch of a new decentralized peer-to-peer messaging app named Bitchat.

Block CEO Jack Dorsey has launched Bitchat, a new peer-to-peer messaging app that works entirely over Bluetooth mesh networks.