MyDays

MyDays X is a personal cycle diary and lifestyle calendar created to help people track their menstrual cycles in a calm, straightforward way. First developed in 2008 and launched as a cross-platform app in 2012, it was created by independent developer Christian Albert Müller, who continues to lead its development. The app is being rebuilt from the ground up, drawing on 18 years of experience with cycle tracking.

Users can record periods, symptoms, personal notes and intimacy, then view estimated cycle days for general orientation. Home-screen widgets offer a quick view of cycle information, and the app is designed for iPhone and Android. MyDays X presents tracking as an uncomplicated daily practice, bringing calendar tools and personal records together in one place. Its estimates are not medical advice, and the app is not a medical device. The new version is in beta testing, with users invited to try it and share feedback as it moves toward release.