Sixteen grams on your wrist reads every stroke you swing, every serve you strike and every hour you sleep — then tells you exactly what your body can take tomorrow.
From $18/mo · Device included · Free worldwide shipping · Six colourways
The same band, the same data. A twelve-year-old learning to manage load and a touring pro managing a season are solving the same problem at different scales.
Full extension on the toss, racket loaded behind the shoulder before contact.
Hips rotate through contact, racket arm extending across the body.
Two-handed backhand, compact rotation through the strike zone.
A six-axis sensor sampling at 200 Hz, on your wrist or clipped to the racquet throat. Everything below is measured directly by the band.
Ball speed, aces and in/out calls need ball tracking, not motion sensing. We publish what the band measures and what it doesn't.
Every strap is woven in a string-bed cross-hatch, and the face carries a single lit seam taken from the ball. Swap straps in two seconds — the module clips into any band, and into the racquet mount.
Fully adjustable from 125 to 220 mm. No sizes to choose, nothing to exchange — the same band fits a twelve-year-old and a grown adult.
Continuous heart rate, HRV, respiratory rate, skin temperature, sleep staging and daily strain. The same physiological picture you'd expect from any serious wearable.
Strain from running and strain from serving break down completely different tissue. Shoulders, wrists and lower backs fail in tennis for reasons a generic strain score can't see, because it never counted the strokes.
A weekly cap on service load, set from your own history rather than a generic table.
One-sided loading caught before it becomes an injury you play through.
Put your event in the calendar and the plan works backwards from it.
Not a wall of charts. The band reads last night's recovery against this week's accumulated stroke load and gives you a single call: push, maintain, or rest. Coaches get the same view for the whole squad.
Every practice scored against what you were actually trying to do that day.
Load, volume and consistency across a full tournament calendar.
Grant access per coach, revoke in one tap. Nothing shared by default.
Recovery is good but you've hit 214 serves in four days — 22% above your rolling average. Full technical session is fine. Keep serving volume under 60 and leave match play until tomorrow.
Hardware, app and every metric in one price. Free band upgrade each year on annual plans.