Many people use step counters, monitor their sleep with smart wristbands, or cheer on their friends in exercise apps. New technologies are not ethically unproblematic. “When a great deal of health data is produced on us, it is also recorded somewhere. And it is being controlled by major corporations, not the public health system. What if we later decide we no longer want to share our information?” asks University Researcher Venla Oikkonen. Researchers in Helsinki tackle self-quantification from the perspectives of gender, class, and ethnicity.