PowderMeet
Ski-mountain meetup solver for friends across the resort.
PowderMeet picks the optimal rendezvous across a ski resort, accounting for trail topology, lift wait times, and ability differences. 159 Epic and Ikon mountains supported.
How it works
Resort-aware pathfinding
Dijkstra over an OpenStreetMap trail and lift graph with alpha-weighted lift-wait penalty on max(tA, tB). Custom binary min-heap with lazy deletion and lexicographic edge-ID tie breaks so two devices converge on identical paths under equal-cost ties.
Fingerprint-identical client graphs
Server-side snapshot pipeline (Overpass + DEM) publishes a per-resort manifest to Supabase Storage. Quantized inputs (15-minute time buckets, 0.5°C temperature, 10m elevation) let two clients solve byte-identical graphs without coordinating.
Realtime presence at scale
Geohash-6 bucketed Supabase Realtime channels (1.2 km cells, 9-cell neighborhood subscription) cap presence fan-out by proximity instead of friend-graph size.
Server-enforced safety
Postgres state machine on meet_requests and friendships uses CHECK constraints and BEFORE UPDATE triggers to reject backward transitions. Spatial trigger resolves resort_id server-side from lat/lon to block location spoofing, all gated by RLS through an accepted-friendship join.
Refreshed feature-by-feature demo videos and a screenshot gallery are coming up shortly.
For TestFlight access in the meantime, text 847-226-5527.