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Whistle

Name: Whistle
Author: sjmcnamara

sjmcnamara

Decentralized group location sharing over Nostr + MLS

Security & privacy
FOSS
Free
Nostr

Android only

Get Whistle

Get it on Zapstore Get it on GitHub

What are these stores? Zapstore, GitHub

Whistle is an open-source, decentralized group location sharing app. No accounts, no servers, no plaintext data on relays — groups are end-to-end encrypted with MLS (RFC 9420) over Nostr via the Marmot Protocol.

Developer: sjmcnamara
Website: getwhistle.org
Source code: github.com/sjmcnamara/whistle
Added to AppCosmos: 10 October 2026
License: Unlicense