In my perfect period app, Judy Blume would pop up on my phone screen and remind me to clip my sanitary pad to my sanitary belt. Unfortunately — life isn’t perfect. But, that’s okay because we have some pretty exciting free period apps to track Aunt Flow’s arrival. Whether you just want a heads up that you’ll be surfing the crimson wave soon, or a way to track your fertility, these period tracker apps are here for you.
This story was originally published on April 12, 2014, and has been updated throughout.