"Actors attuned to the “unique" health and performance needs of women athletes increasingly emphasize female technology, or FemTech, as a way to empower athletes, mitigate injury risk, and maximize performance. Of particular interest are digital menstrual cycle tracking apps with coaching platforms, where team staff can view and make decisions based on menstrual cycle data and predictions. Menstrual coaching apps advertise welcome investments in women's sport and solutions to a variety of familiar epistemic injustices: the distributive epistemic injustice of a sport science research program skewed toward male athletes, the hermeneutical injustice of taboos around menstruation, and the testimonial injustice of women not being believed when they report symptoms. Building on feminist critiques of FemTech and critical analyses of digital menstrual tracking as workplace biometric surveillance, we argue that, in fact, menstrual coaching apps likely exacerbate epistemic injustices while accelerating managerial control over women athletes as workers.”