How do I adjust the ovulation days?

Currently, there isn't a way to manually adjust ovulation on Glow, but the app will improve in its ovulation predictions based on logs such as basal body temperature (BBT), ovulation test strips results (OPKs), etc. For users with more irregular periods, it may be better to turn off period predictions and just manually input your own cycles and use notes to keep track of potential ovulation. We are working on improving manual tracking for ovulation.