Whistle

Open-source decentralized location sharing app, powered by Nostr, MLS, and Marmot.

Marmots are profoundly social animals. They live in close family groups, keep watch for one another, and communicate through sharp whistles that carry across distance — a simple system built on trust, awareness, and care.

Most location-sharing apps route your real-time movements through servers that store, analyse, and monetise your patterns. They require accounts, phone numbers, and emails — turning a simple "are you home safe?" into permanent surveillance infrastructure you didn't ask for.

Whistle is built around a different principle.

It’s a private, encrypted group network designed to keep people connected without intermediaries. No servers. No accounts. No data trails. Just direct, secure sharing between the people you choose. Built on open-source tools and public cryptography, it uses Nostr for identity and message delivery, MLS for end-to-end encryption, and Marmot as the glue that binds it all together.

Share your location when it matters, with the people who need it. Stop when it doesn’t.