GROUND TRUTH · ARTIFACT 02

Physiology needs labels.

Freyja Ground Truth Lab

Freyja Ground Truth Lab is a native iOS research artifact for testing how continuous wearable physiology can be aligned with independent molecular events. It combines controlled synthetic scenarios, probabilistic inference, stress testing, and public research context to reveal when wearable-only models become ambiguous—and why longitudinal molecular ground truth is necessary for reliable personalization, especially in irregular physiology.

◉ The browser experience is a responsive adaptation of the native iOS model, preserving the same five tabs, narrative, synthetic scenarios, benchmark logic, and stress-test interactions.

Core question

What do wearable signals actually mean?

Method

Probabilistic inference · controlled stress tests

Wedge

Reproduction as accessible molecular ground truth