Labrador is a simple and affordable device enabling at-home, noninvasive diabetes diagnosis. 22% of people with diabetes and 84% of people with prediabetes are under-diagnosed, costing billions for healthcare payers. Labrador enables early diagnostics of diabetes by providing an at-home noninvasive test using a smartphone. In most cases, early intervention can efficiently reverse diabetes even without medication. However, having no symptoms at its earliest stages, people don't get tested often enough and miss the opportunity for prevention. Our saliva-based at-home diagnosis increases adherence with better engagement and experience at a lower cost.