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A private period tracker in your calendar

Plan your days around your body.

When. puts every phase of your cycle on the calendar you already use, so you can plan your days and schedule events around what your body needs.

Create your account

  1. Log the day each period starts.
  2. When. learns your cycle and predicts each phase.
  3. Your phases land on your Google, Notion, or CalDAV calendar, ready to plan around.

Free for 14 days, then €4/month.

Made by Anna and Linh.