Self-tracking is an increasingly ubiquitous everyday activity and therefore is becoming implicated in the ways that everyday environments are experienced and configured. In this article, we examine theoretically and ethnographically how the digital materiality of these technologies mediates and participates in the constitution of people’s tacit ways of being in the world. We argue that accounting for the presence of such technologies as part of everyday environments in this way offers new insights for non-representational accounts of everyday life as developed in geography and anthropology and advances existing understandings of these technologies as it has emerged in sociology and media studies.