Introduction

Over the last decade, we have witnessed rapid development and widespread of digital tracking devices, apps, and platforms, together with the emergence of global health movements, such as the Quantified Self. Millions of people around the world are now routinely using such technologies to track, document and analyse their physical activities, vital functions, and daily habits, all with the aim to assess and improve their health, productivity, and wellbeing. And with the current Covid-19 pandemic, the uptake of such technologies has accelerated, as tracing apps, biometric techniques (such as temperature monitoring, thermal imaging and facial recognition) and health data gathering and analysis have become important dispositifs for managing the pandemic at the governmental and personal level.