Strata
Backcountry trip planning · iOS

Know your pitch before you commit to the line.

No spreadsheets, no five-app shuffle. Strata reads the avalanche bulletin, the slope angle, the aspect, and the live weather for any route — then tells you, in plain English, whether today is a go. Plan it, track it, and bring your crew home. Native iOS, offline maps, no ads.

Download Strata on the App Store See features

Now on iPhone & iPad · free to plan · Pro unlocks the snap-to-trail route builder.

Built on the data the pros actually use

Avalanche.org bulletins (CAIC, NWAC & more) · USGS 3DEP elevation · Open-Meteo · NIFC fire perimeters · OpenStreetMap · Wikipedia

Everything in one trip, so you're not stitching apps together

Smart route discovery
Browse curated routes or search millions of mapped trails. Nearby alternatives rank safer lines first, based on today's conditions.
AI safety verdict
A Claude-backed analysis fuses the avalanche bulletin, slope angle, aspect, and live weather into one plain-English call: go, watch, or avoid.
9-tile conditions ribbon
Weather, AQI, cell coverage, snow, avalanche danger, and streamflow — pulled live and color-coded safe, watch, or avoid at a glance.
Multi-day planner
Build trips with waypoints, overnight camps, and stacked descents. A pre-flight prep sheet lines up your activity, crew, return-by time, and gear before you head out.
Live group awareness
See your crew's real-time positions on the map, and fire a one-tap SOS that shares your location with the whole group.
Tour recaps & memoriesNEW
Your recorded GPS track against the plan, elevation profile, and stats — built into a multi-day trip story you can look back on.

What's actually different

Strata doesn't just show the data. It makes the call.

Other apps hand you a slope-angle layer and a weather widget and leave the judgment to you at the trailhead. Strata weighs the things that actually hurt people — wind slabs on lee aspects, steep rollovers, a forecast turning while you're above treeline — and gives you one verdict you can read in five seconds.

⛷ Tamarack Peak · N–NE aspect · today
Watchverdict · wind slab forming
Consid.Avalanche danger · 9,500 ft and up
34°max slope on the standard line
SE <32°Strata's safer alternative

Works solo. Better with a crew.

Every screen works on its own — plan a route, get your own safety verdict, record your track, no partners required. When you tour with others, add them to your roster and see everyone's live position on the map. If something goes wrong, one tap fires an SOS with your coordinates to the whole group. Track recording and your planned route keep working long after the bars disappear.

Pro: draw lines that snap to the mountain

The Pro route builder snaps every waypoint to real trail geometry using a precomputed graph and A* pathfinding, then vets the line against slope angle, aspect, and today's avalanche danger. Pro also unlocks downloadable offline map packs, unlimited saved routes, and trip reports for multi-day tours. See pricing →

How your data is used

Strata uses your location to show you on the map, record your track, and share your live position with the crew you choose — and nothing else. Route-safety analysis runs through Anthropic's Claude as a data processor that never trains on your data. Maps are downloadable for offline use, so the app keeps working with no signal.

We do not sell, share, or use your data for advertising. We do not set tracking cookies or run analytics pixels on this website. Read the full Privacy Policy and our Security overview.

Safety is the point
Strata informs your decisions — it doesn't make them for you. Every verdict shows its reasoning so you can overrule it with eyes open.
Works off the grid
Track recording and your planned route keep working with zero bars — and Pro adds downloadable offline map packs for the regions you tour.
Independent studio
Strata is small and independent. The same hands that ship the design ship the code and answer the email.

Ready to plan your next line?

Strata is on the App Store. Plan routes and read today's verdict for free — upgrade to Pro when you want the snap-to-trail builder and unlimited saved routes.

Download Strata on the App Store See pricing