How can I change the measurement system? Valerie April 21, 2020 16:00 Updated To change the measurement system, go to Menu > Settings > Metric system and disable or enable it. Related articles How do I use the app? How can I change the language of Flo? How do I edit the incorrectly logged basal body temperature/weight? My period is late, but Flo just moves its prediction to the next day How do I log my birth control method? Comments 0 comments Article is closed for comments.