One mountain brain.
Here's how to drive it.

Live report: depths, fresh snow, lifts open/total per lift, weather, piste map, and webcams with worldwide coverage (Windy network + resort cams). The "Sun on the mountain" 3D map shows piste and lift names on hover.

0-100 "should I go?" score with the best day ahead and why.

Replay your ski day as a 3D drone flight. Record it to video. Race ghosts. Drop a GoPro MP4 directly -- the GPS track is read from the video; nothing uploads. After the day loads, runs are named after the pistes they match; hover over the 2D or 3D map to see run, piste and lift names. If the wrong resort is linked it auto-corrects to the track's location. Drop a video onto a loaded day and Cinema opens itself -- footage with live stats overlaid, synced to the GPS clock. Toggle the 3D map to fly the terrain alongside your clip (the camera follows the video; drag the picture-in-picture anywhere, drag its top corners to resize). The run list highlights whichever run is playing -- click any run to jump to it. Cycle overlay presets, then export share-ready clips (free: up to 60 s, watermarked; Pro: up to 300 s, clean). Video never leaves your browser.

The desktop app (macOS & Windows) for full-length overlay films -- speed, altitude, slope grade, vertical speed, distance and heart rate overlaid on your raw footage, rendered faster than realtime, with a project bin and synced preview. Sync is GPS-clock automatic for GoPro files; a manual sync deck with timezone-first controls covers everything else. Day Reel builds your whole day into one file with title and chapter cards. Pro adds custom widget layouts with the slot editor, overlay-only export (green-screen MP4, or transparent WebM where the machine's encoder supports it), unlimited length and no watermark; free exports 60 s watermarked. Your video never leaves your machine -- network calls are limited to licence verification and an optional resort lookup for Name my runs. Beta builds are rolling out now.

Drop a GPX file, get it back enriched: slope, sun exposure, archive weather along every segment, nearest piste names.

Record your day with just the phone, live vert, runs, top speed, then straight into the 3D flyby. Never uploaded.

Turn-by-turn to any piste, lift base, friend, or the base, avoids lifts reported closed (live across the Tarentaise).

Whiteout bail-out: guided descent to the base, turn-by-turn, works offline.

Find-my-friends on the piste map. One 6-letter code, no accounts.

Draw an off-piste line, get slope°, aspect, altitude and avalanche overlap.

Tonight it plans tomorrow: which piste at which hour, sun and snow aware.

Booking odds per week from 15 seasons of history.

Shared days, per-piste leaderboards, race the legend.

Push notification when 10 cm+ lands on your favourites.

One 6-letter code links your phone, browser and watch, favourites, Pro unlocks and your ski-day history follow you everywhere. No accounts, ever. The QR page confirms with "✓ Linked, favourites synced" when linking is complete; favourites are never lost when you link. Linked browsers also self-heal: if Safari clears the site's storage (it does after 7 days away), your favourites restore themselves on the next visit.

All buttons and tap targets grow to 44-64 px -- usable with ski gloves on. Activates automatically on narrow viewports; toggle big-ui anytime.

Automatic run / lift / idle detection from motion, no tapping. Live vert, speed, flow score per run. mi/ft ⇄ km/m toggle. Crash-safe: resume right where you left off if the app is killed. Screen-off background recording keeps the battery going all day.

The full resort experience in-app: depths, lifts open, Snow IQ, piste map, navigator, day plan, party, everything from the web app without leaving.

Every recorded session is listed here. Tap one to open it straight in the 3D flyby. Publish the ghost or keep it private.

When a resort is selected, anonymous run aggregates (speed, vert, line) are contributed to that resort's crowd piste-conditions layer. Full tracks never leave the phone unless you publish a ghost.

A Health toggle in the Record tab asks Apple Health permission, then auto-imports all ski/snowboard workouts from the current season. Imported days appear in the Days tab with a "from Health" badge, workouts with a GPS route get full run detection and 3D flyby; route-less ones (typical for Garmin Connect, which does not write GPS to Apple Health) appear as summary cards (duration/distance/kcal). A Hide button permanently removes an imported day. Toggling Health off and back on re-scans the whole season. Apple Watch native ski workouts carry routes → full pipeline. The full-fidelity Garmin path remains: EM-Snow watch apps or GPX/FIT drop at /flyby. EM-Snow only reads ski/snowboard workouts and never writes to Apple Health. If 0 workouts appear, check Settings → Health → Data Access & Devices → EM-Snow.

The GPS duty-cycles itself on lifts and the barometer feeds altitude, a full ski day in your pocket on a fraction of the battery. Each day's battery use (%/h) shows in the Days list.

Pair the app with your browser and watch in one code, favourites, Pro unlocks and history shared across all of them.

Not on iOS beta yet? The web recorder at /js/phone/ runs the same logic in your browser, good for a demo walk before you hit the slopes.

Base/summit depth, 24 h snow, surface type, resort elevations.

Daily + 37-hour view with wind, snowfall and temps by elevation.

One line in the widget carousel, daily fallback when hourly is missing.

Menu → "Send day to phone" → QR opens flyby ready to import your day.

Menu → "Link devices" shows a code + QR that ties the watch to your phone & web, shared favourites and Pro unlocks. Or type a code from /pair into the widget's settings.

Hourly forecast updates without opening the widget.