The EYVA device is, according to the startup behind it, not only the world's first non-invasive glucose monitor but also the world's first healthtech gadget. The EYVA can check the user's blood sugar levels and also measure things such as temperature and SpO2. The non-invasive gadget has been designed by an Indian startup called BlueSemi.
https://www.notebookcheck.net/EYVA-World-s-first-non-invasive-glucose-monitor-could-cost-the-equivalent-of-just-over-US-200-no-blood-required-but-it-s-not-medical-grade.594162.0.html