AUTOREGISTRY · ARTIFACT 01

Validation before inference.

Freyja Validation Lab

Freyja Validation Lab is a native iOS research artifact for comparing temperature signals from Apple Watch, WHOOP, and Oura before they are treated as interchangeable physiological measurements. Across a controlled 48-night protocol, it surfaces differences in baselines, provenance, missingness, environmental sensitivity, and device agreement—turning raw wearable outputs into an auditable validation decision.

The question we want to answer is: Can all werables be used? Can signals from different wearables be used interchangeably, and can they be reliably combined within the same physiological model?

◉ The browser experience is a responsive adaptation of the native iOS model, preserving its tabs, language, study logic, and core interactions. HealthKit and live wearable connections remain native-only.

Devices

Apple Watch · WHOOP · Oura

Protocol

48 synthetic nights · deterministic

Purpose

Cross-device validation before inference