# What do a tree inspector, a flood relief team and a scavenger hunt have in common? Meet Mindoo Cairn > Source: > Published: 2026-10-14 09:00:00+00:00 Mindoo Cairn is the newest app in the Haven App Store: a shared field map on which a team pins, photographs, sketches and measures together - with pen, finger or mouse, on phone, tablet and desktop, offline, end-to-end encrypted, and merged without conflicts by Automerge when devices meet again, through a server or directly peer to peer. Workbooks turn the same map into a tree inventory after the FLL guideline, a crisis situation map with an incident log, a playground or hydrant inspection with checklists and QR labels, or a city rally with encrypted stations, a comic intro and mini games. Time travel compares a workbook at two points in time, side by side or with a slider. And because Haven is learning to speak WebMCP, an AI model can already search Cairn's workbooks, place markers and draw what it found on the map - work in progress, but worth a look. There is a new site for it at mindoo-cairn.com.