52 × 35 × 11 mm
Small enough to forget.
About the size of a matchbox and lighter than a ski glove. Once it’s strapped on you won’t notice it in the turn.
Read every turn.
KARV is a 25-gram sensor you strap to each ski boot. It measures your edge angle, load and rhythm on every turn, then shows you where your left and right leg ski differently.
Nordic nRF52840
Six axes, hundreds of times a second.
A gyroscope and an accelerometer track how your boot tilts, twists and loads. The same chip sends it all to your phone over Bluetooth 5.
200 mAh
Sized for a full day out.
A 200 mAh cell sits in its own bay, away from the electronics. It sleeps on the lift and wakes when you push off.
USB-C
USB-C, facing the snow.
The port sits deep in the shell and points down when the pod is on your boot, so snow falls away from it. A soft plug closes it on wet days.
One for each boot.
Left in gate blue, right in gate red, like the poles on a slalom course. Because there are two, KARV can compare your legs turn by turn, and that’s where most skiers find their biggest gains.
Your run, drawn back to you.
Every turn becomes a line on the slope with numbers on it. This is an example run of seven turns.
- Turn
- 1
- Edge angle, left
- 0°
- Edge angle, right
- 0°
- Load
- 1.0 g
On left turns your right ski edges 6° flatter than your left ski does on right turns. Close that gap and both turns will feel the same.
Ski the run.
Read it on the lift.
The pods record while you ski and sync when you stop. By the time the chair reaches the top, your last run is on your phone.
What it measures
Five numbers that coaches watch for, from sensors on both boots.
-
Edge angle
How far each ski tilts onto its edge in the turn. More angle means a tighter, cleaner carve.
-
Left and right
Your left turns against your right turns, and your left leg against your right. Nearly everyone has a strong side.
-
Load
The force through each boot, in g. It shows where in the turn you build pressure and whether you hold it.
-
Rhythm
Time from one turn to the next. Steady rhythm is the first sign of a skier who is in control.
-
Edge change
How quickly you roll from one set of edges to the other. A slow change is where speed and grip get lost.
On in ten seconds.
Thread the strap
Pass a 25 mm strap through the two slots on the back of the pod. Your boot’s own power strap fits too.
Wrap it round the cuff
Above the top buckle, at the back or on the outside. The arrow on the lid points up.
Pair both pods
Open the app, hold the pods near your phone, and pick which one is left. Then go skiing.
Specs
- Size
- 52 × 35 × 11 mm, 49 mm wide at the strap lugs
- Weight
- About 25 g per pod
- Motion sensor
- 6-axis IMU: 3-axis gyroscope and 3-axis accelerometer
- Processor and radio
- Nordic nRF52840, Bluetooth 5
- Battery
- 200 mAh lithium-polymer, replaceable
- Charging
- USB-C, with a TPU plug for the port
- Shell
- PETG or ASA, screwed shut with three M2 screws
- Mounting
- 25 mm hook-and-loop strap, or the boot’s power strap up to 40 mm
Be on the first lift.
We’re building the first batch of pods for this winter. Create an account to join the beta. We’ll write when your pair is ready.