Very useful app! I frankly didn’t keep track of my period and relied on my body giving me hints beforehand. After getting a copper IUD, the heavy periods that came with it made relying on hints a recipe for embarrassment. This app is very useful for at least getting ball park information and even planning vacation. It’s documentation of my cycle has even given me insight into how my mental state changes with my cycle. It’s been an invaluable tool in knowing what me and my body need and how to prepare. It’s an app I believe should be a piece to every menstruator’s health maintenance. For necessity sake, it has served me well, but it has also given great tips on feminine health and well being with its articles that I enjoy! Please take care of yourselves out there and find an app or tool as good as this has been for me.