Confidence

Why this app talks about confidence so much

A phone video has real limits. Honest uncertainty beats a confident wrong answer.

Published 20 June 2026 · Updated 8 July 2026 · OpenBikeFit

Visual noteA number becomes useful only when its source, repeatability and uncertainty remain visible beside it.

Keep noise visible

Compare two controlled sessions

See movement deltas only when setup, camera protocol and observed noise allow an honest comparison.

Open tool

Pose estimation from a single phone clip is genuinely useful, but it is not lab-grade. Camera angle, distance, lighting, and clothing all affect accuracy, and small position changes are exactly where measurement error bites hardest.

A cyclist documenting measurement conditions beside a laptop, camera and road bike — Confidence starts with a setup that can be documented and repeated, not with extra decimal places.

So this app measures several pedal cycles, looks at how consistent they are, and attaches a confidence band to everything. When confidence is low, it asks for a better clip or a human — it does not guess a millimetre.

A physical bike measurement being checked against a visible reference point — A useful number keeps its source and measurement conditions visible beside it.

If a tool gives you a precise-sounding number with no sense of its own uncertainty, be skeptical.

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