I always found it boring and time consuming to fill in the data manually. Sometimes I even forget that I had a particular symptom during the day which makes the log less accurate. There are so many activity trackers out there, why there's nothing thay would track everything automatically? Would you buy a device that would track your cycle when <a href="https://play.google.com/store/apps/details?id=com.glow.android">Glow app</a> is not around? (looking at cool tech, surprised there's nothing about menstrual health out there)(learn more on Glow: https://glowing.com)