A barbell collar that sees what you don't.

You can't improve what you can't measure.

There's more to your lifts than weight on the bar. Kyna unlocks the metrics that have been missing from your training.

70%
of athletes feel uncertain about their gym performance regularly
37%
are frustrated by the lack of objective feedback during sessions
59%
have never used a performance tracking device - the market is wide open
Source: Kyna market research · 80 athletes & coaches · Feb–Mar 2026
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Hardware

Engineered for you.

The Idea

One device. Every athlete. A baseline that's yours alone.

Equipped with a suite of sensors that measure your performance, and paired with software that learns your unique style. Every athlete moves differently. Kyna picks up on yours and builds a baseline that's yours alone - so the feedback you get is yours alone too.

Specifications
Sensor
Bosch BNO085 9-axis IMUaccelerometer + gyroscope + magnetometer, with built-in sensor fusion
Accuracy
±0.35 m/s²inferred from datasheet
Sample rate
400 Hz onboard fusion
Connectivity
Bluetooth Low Energy → iOS app
Form
Clips onto any standard 50 mm Olympic bar - like any other barbell collar.
Weight
92 g measured · single clip
Battery
~12 hours active, 30 days standbyUSB-C, full charge in 40 minutes
Why the BNO085: IMUs measure acceleration directly, providing reliable acceleration sensing in three dimensions.
IMMEDIATE · AFTER TRAINING · LONG TERM

One device. Three ways to see your lifting.

Kyna app showing three live scores after a front squat
Panel 01 · In the moment

Immediate feedback. Three scores.

Simple, easily interpretable feedback the second you rack the bar. Three numbers out of 100, each calculated against your own history - no biomechanics degree required.

Kyna app showing time-series force vectors and acceleration
Panel 02 · In the session

Zoom in. See every instant.

Time-series data for medium-term review - force production, vertical acceleration, and the direction of force output at every instant of the lift. The view your coach has been waiting for.

Kyna app showing historical training database
Panel 03 · Over time

Long lookback. Real trends.

Every lift, stored and searchable. Track improvement over weeks and months, see how your strength trends, and find the load you produce the most force with.

For the athlete who wants to get better.

Clip on. Lift. See your scores. No complex setup. No bulky equipment or calibration routine. You already use a collar - why not use Kyna?

BETA · WAVE 01

Available on the App Store. First trial underway.

Ten prototype devices are in the field with our first pilot users. The next batch is opening to beta sign-ups now.

Download on the
App Store
Join the beta list and occasional product updates. No spam, no noise.
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