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Arno Welzel

  • Periodical
    Periodical

    Lifestyle 1.80 4.70M Arno Welzel

    This innovative Periodical app simplifies menstrual cycle tracking and fertility prediction. Using the Knaus-Ogino method, it accurately calculates fertile days and allows you to track symptoms for a better understanding of your cycle. Data backup ensures peace of mind, and the app is completely f

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