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.

A small chip next to the snow depth cross-checks the reported figure against an independent weather model and a nearby measured mountain station, allowing for the height difference between them so a snowy summit and a bare base are not mistaken for a disagreement. It reads Cross-checked, Unconfirmed or Sources vary, and the tooltip shows every source with its depth, height, distance and age so you can see the working. This is a new feature and still being calibrated, so treat it as a guide for now, not gospel.

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. Your day is editable: the day list shows every run, lift ride and the bits in between (waits, walks and slow slides, each labelled from what you actually did); tap any grey stretch on the map or in the list to rename it, fold it into the run beside it, or promote it to a run of its own, with nearby piste names suggested and ranked. Edits save on your device and re-apply if you drop the same file again. Explorer dims every piste you didn't ski, so you can see how much of the mountain you covered. Both maps carry the official-style piste overlay and a My-track filter (runs, lift rides, wandering, one-colour mode). 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. One button records a highlight film of your best runs; the Day-print shares your route as a picture lit by the actual sun that day. Cycle overlay presets or build your own layout with the drag-and-drop widget editor: drag in data widgets for your top speed, average speed, a session timer or a piste-difficulty chip, and tune each one's accent colour, size, label and backing. Pick 16:9, vertical or square export, then share (free: up to 60 s, watermarked; Pro: up to 300 s, clean). Set an in/out window on the elevation timeline and Play flies just that section. Prefer quality over speed? Render film renders your fastest run, steepest run, biggest descent, a chosen section or the whole day offline at a clean fixed frame rate, however slow your machine -- pick 16:9, vertical or square, then save straight to your device. 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, your top speed (private, never shared), then straight into the 3D flyby. Never uploaded.

Turn-by-turn to any piste, lift base, friend, mountain restaurant or hut, marked rescue point or SOS phone, or the base, steering round runs and lifts reported closed and checking first if you really want a closed run (live across the Tarentaise). Runs also carry live condition reports from other riders (closed, icy, moguls, powder, groomed), a coverage badge shows how well the resort is mapped, and closures keep working offline for a day; wander off the map and it shows your GPS spot with a compass arrow pointing back at the resort.

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 on the sun map, get slope°, aspect, altitude, a difficulty grade, sun/shade at the time you're checking, and the day's avalanche bulletin overlaid by aspect and elevation -- decision support, not a green light. Press Done, then tap your line for its elevation profile. Share a line with a link.

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

Booking odds per week from 15 seasons of history.

In the Signal view, a per-resort climatological lean for the season ahead, not a forecast. It takes this resort's own archive of past winters, matches them to the current El Niño or La Niña state (NOAA CPC), and weighs them against its own typical winter to show a tilt in the odds: a little snowier or drier, warmer or cooler, with the past winters it leans on, where in the season the lean concentrates, and how often the same method called the direction right here. We never put a snow figure beyond the 16-day forecast. Most resorts, the Alps especially, honestly show no reliable seasonal signal, and the card says so and points you back to the 16-day view.

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.

Snow depth, powder chance and lifts open as complications on your watch face, plus a glanceable conditions screen and a lift-by-lift status list for your resort. Piste Pilot turn cues buzz on your wrist while you ski, phone in your pocket; pressing End on the watch ends navigation on the phone. Installs automatically with the iPhone beta.

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.