This is a very welcome and timely contribution. Rather than evaluating self- tracking as either empowering or not, it goes into a more nuanced, complex and engaging account of the temporalities of self-tracking technologies. How they are entangled with everyday life, how they participate in different human futures, and how they serve as a tool for learning about ourselves as human beings. Highly needed and highly recommendable! - Dorthe Brogård Kristensen, University of Southern Denmark