Signal 03 · Bio

What the sideline can't see.

Heart rate variability, resting heart rate, sleep, recovery. Her body is reporting on itself every night — the watch she already wears is the only thing that hears it.

early morning, watch on wrist, still waking up

Tap “How this works” inside the screen

What it does for her

Why Bio earns its place.

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It runs by itselfNothing to log. Her watch syncs, the numbers land, the picture updates while she sleeps.
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Illness shows first hereA body about to get sick shifts these numbers days before she feels it. That's a training week saved, not lost.
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Measured against herNot against a chart of averages. Her own baseline, so it means something for her specifically.

For you: this is the objective second opinion — the part that's true whether or not she feels like telling you.

For the parent

Bio is one quarter of the answer.

On its own it can mislead. Read with the other three, it’s the closest thing to certainty a young athlete can get.

Start monthly — from $49 See all four combine →
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