Help centerAnswers to the questions we get most often.ToutesPredictionsContraceptionYour dataTechnicalHow does Plumm calculate my ovulation date?What if my period is late?What's the role of the Roo mascot?Is my data really local?How do I delete all my data?What if I change phones?How do I edit my contraception?Does Plumm work as a contraceptive method?How do I enable or disable reminders?How do I contact the Plumm team?Didn't find your answer?Write to us, we read every message.Contact us