BBC and Privacy International have conducted a study on popular apps, including the Period Tracker by Leap Fitness Group, to determine if they share user data with Facebook. The study found that none of the apps analyzed shared data with Facebook, which is a positive result for user privacy. The Period Tracker app is a reliable period and ovulation calculator that can be used even with irregular periods. It allows users to view past and predict future periods, fertile days, and ovulation days.<br/><br/>The app is accurate and reliable, with predictions based on the user's menstrual history. It becomes even more accurate with usage, thanks to machine learning. The app has a beautiful design with lovely decorations, and users can view their notes, intercourse history, moods, symptoms, weight, and temperature chart, among other things. All data can be automatically backed up by signing in with a Google account, and the app does not collect or sell any user data.<br/><br/>The app also includes features such as cycle tracking, period tracking, ovulation prediction, and a unique period tracker diary design. Users can customize their personal period length, cycle length, and ovulation for irregular periods. The app calculates the user's chance of pregnancy every day and has a pregnancy mode for when the user gets pregnant or finishes pregnancy. It also includes symptoms to record, notifications for period, fertility, and ovulation tracking, weight and temperature charts, and supports multiple accounts for period ovulation tracking. The app is available in multiple languages.<br/><br/>Looking for pregnancy apps? The Period Tracker app can also be used as a pregnancy app, helping users easily get pregnant or practice birth control. It is the best period tracker for women to track their period and ovulation, and it is the most reliable period tracker for women. <br/><br/>Overall, the Period Tracker app is a reliable and secure way for women to track their periods and ovulation, with a beautiful design and many useful features. It is also reassuring to know that the app does not collect or sell any user data, as confirmed by the recent study by BBC and Privacy International.