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Flight analysis & planning for BASE jumpers

Every jump.
A clearer margin.

Bring your recordings, deployment, terrain and weather into focus. Learn from the flight behind you. Add context to the one ahead.

Try the demo Plan a route

Free, and no account needed. Start with a public flight or import your FlySight recording.

FlySight recordingsDeployment stagesCesium 3D terrainWeather context

WHY IT MATTERS

The margin is small.
The picture is scattered.

Recordings sit on a device

A FlySight file shows what happened, but not against the terrain or the weather at the exit hour.

Terrain and weather live elsewhere

Maps, elevation and forecasts each open in a different tool, and none of them knows your flight.

Sliderdown puts them together

Every flight, its deployment, the terrain below it and the conditions around it, in one place you can question.

ONE CONNECTED WORKSPACE

Follow the details.
Keep the whole flight in view.

A shared library carries your recordings, selections and preferences across the tools.

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See the flight

Import a FlySight recording, trim it, and replay it over 3D terrain. Inspect altitude, groundspeed, descent rate and glide ratio as it unfolds.

Open flight viewer
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Understand deployment

Follow altitude lost from exit through line stretch, inflation and 1:1 glide, with clear stage and cumulative measurements.

Explore a recording
⌁

Plan a line

Draw a route in GlideLines, see the elevation profile and the glide it needs, and compare it with recorded flights over similar terrain.

Open GlideLines
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Check the conditions

Put the weather from a recorded exit hour beside the forecast for the same spot, so you can see what has changed before you hike in.

Open weather

WHO IT'S FOR

Built for people who
study every flight.

Jumpers learning their numbers

See how much height each deployment stage takes, jump after jump, so your margins rest on your own data.

Review a flight

Experienced jumpers planning new objects

Check a line against terrain and recorded flights from similar exits before the first jump.

Plan a route

Speedflyers

Plan lines with GlideLines, check the weather and replay every run against the terrain.

Open GlideLines

SEE IT IN ACTION

Try it on real flights.
No account needed.

The public library holds recorded flights you can open, replay and compare right now. Import your own FlySight recording whenever you're ready; it stays on your device.

Open the public library Trim a recording
Recorded flights in the public library
26
Average height from exit to 1:1, static line 15 flights
105 ft
Average height from exit to 1:1, freefall 11 flights
252 ft

FROM TRACK TO PLAN

Review the jump.
Plan the next.

01

Import the track

Import a FlySight track or choose a bundled recording.

02

Review the jump

Replay the flight. Check deployment and compare the numbers.

03

Plan the next

Plot a route. Compare exit-hour weather with the forecast.

Your flight data follows you from analysis to planning.

THE CONDITIONS AROUND THE FLIGHT

Past weather.
Future forecast.
Useful perspective.

Place the weather from the recorded exit hour beside a forecast for the same location. See changes in wind, gusts and conditions while planning in the GlideLines.

Compare weather

CLEAR ABOUT THE LIMITS

Context you can question.

Modeled weather

Historical weather comes from gridded models. Actual conditions at a cliff or along a flight can differ.

Estimated exit times

Suggested times are marked as estimates. Confirm the actual jump time before comparing the exit hour.

Ground-relative measurements

Recorded speed and glide describe movement relative to the ground. They do not directly measure airspeed or canopy efficiency.

Private by default

Flights you import stay on your device. If you share one to the public library, the shared copy keeps no record of who uploaded it, and you get a private link to remove it.

PLANS

Free while we grow.
Premium comes later.

Everything you need to review and plan jumps is free today.

Free

Available now

$0

  • Flight Viewer, GlideLines and Track Trimmer
  • The public library of shared flights
  • Exit-hour weather and the forecast against past jumps
  • Basic cloud sync of your recordings
  • KML and track exports, up to 100 a month
Start free

Premium

Coming later
  • Everything in Free
  • 3D video renderings of your flights
  • Advanced chart analysis
  • Advanced weather analysis

Premium will add extras. It will never take away what is free.

Hear when it launches

SLIDERDOWN

Get closer
to your flight.

Try the demo

Analysis supports your judgment. Estimates and limitations remain visible.