Made by swimmers

A swim coach got tired of shouting "elbow up!" across a noisy pool. A sensor engineer in lane three offered to help. Four years and 300 prototypes later, the band does the shouting โ€” quietly.

How we got here

  1. Empty pool lanes

    2022

    A strap and a hunch

    The first prototype was a phone taped to a glove. It survived six lengths.

  2. Swimmers racing

    2023

    The masters squad

    Forty swimmers tested bands every morning for a year and told us exactly what was annoying.

  3. Black fitness band

    2025

    Stroke Band ships

    The first production band launches and sells out in eleven days.

  4. Swimmer in a dark lake

    2026

    Into open water

    The Pro edition adds GPS and sighting alerts for lakes and seas.

Us vs. a regular watch

FeatureStroke BandSwim watch
Reads stroke force, not just lapsYesNo
Worn on the hand, not the wristYesNo
One coaching tip after each swimYesNo
Seven-day batteryYesYes
Waterproof to 100 mYesYes
Subscription requiredNoYes

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