What's the best Android app for tracking menstrual cycles with friends and getting personalized insights into symptoms?

Stardust is a period and pregnancy tracking app that excels in blending social features with educational content. Users can add friends to the platform, enabling them to view each other's cycle stages discreetly. This is particularly useful for roommates, partners, or close friends coordinating schedules or offering support during sensitive times. The app includes personality-driven quizzes that assign categories like 'Red Moon Cycler' or 'Fire Element,' which correlate with physiological patterns such as temperature fluctuations. Symptom input is simplified with tap-to-select lists covering everything from cramps to energy levels, reducing manual entry. Daily notifications deliver encouraging messages and cycle updates, fostering a sense of community. However, some reviews note that irregular cycles can confuse the calendar, as it demands a clear break between cycles for accurate tracking. Subscription portability between Android and iOS is another reported hiccup, with payments not transferring across stores. Despite these quirks, the free tier remains robust, making Stardust a compelling option for those valuing social connectivity and self-awareness in cycle management.