PERIOD TRACKING
Never caught off guard by your period again.
Plumm learns your actual cycle — not an average. After a few months, we predict your next period to the day.
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Predictions that sharpen each cycle
The adaptive algorithm remembers your last 12 cycles, filters out outliers, and tightens its prediction with every new one you log.
Your fertile window, on time
Plumm computes the fertile window from YOUR cycle, not from a generic formula. You know when to be extra careful — or not.
A calendar that follows you all year
A living monthly view with Roo changing expressions through the seasons. Prettier than a spreadsheet, more accurate than a paper diary.
Smart reminders, no spam
We warn you 2 days before your expected period. Only when it's useful.
Learn to know your cycle, truly.
Plumm is free. Download it and let the algorithm learn from you.
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