Earthly Earthly is a touch-first collaborative mapping app for creating, discussing, and sharing geographic datasets over Nostr. Draw points, lines, and polygons; publish versioned GeoJSON datasets; annotate maps with geographic comments; and work in MLS-encrypted Private groups. Android Field sessions add explicit nearby-only collaboration over a shared Wi-Fi network or hotspot, including chat, map editing, and one-time mirroring of referenced map files for offline use. Earthly includes its own local relay and Blossom service. Core nearby and offline workflows do not require a separate companion relay app.