Standardized movement assessment, measured by two phones.

Movement is still mostly assessed by eye. A coach watches a squat, a clinician watches a hop, and what they saw is written down as an impression that cannot be compared with the next session or with another coach. QOOM exists to replace that impression with a measurement that can be repeated — and that is honest about its own uncertainty.

QOOM runs a fixed set of standardized assessments — squat, countermovement jump, drop jump, single-leg hop, change of direction, the 505 and treadmill gait — from two calibrated phone cameras. Two angles let a joint be resolved in three dimensions, so an angle or a displacement is comparable from one session to the next. No force plates, no markers, no lab.

Every number declares where it came from. Metrics are computed between named events. A metric is compared against a reference distribution only when the registry holds one, and a zone is shown only when the evidence gate admits that distribution’s source and evidence level. When the evidence is not there, QOOM says so instead of showing a colour, and the evidence page reports the live counts.

We build on the open-source OpenCap approach — markerless pose estimation from calibrated cameras, fitted to a scaled musculoskeletal model (OpenSim) to compute joint angles — and we are working toward reference data traceable to papers we hold, and transfer studies that check QOOM measurements against those references. Until then, the most useful comparison is an athlete against their own earlier sessions.