Shiro has launched a built-in Period Tracker, giving users a convenient way to log their cycles, track patterns, and see predictions based on their personal history — all without leaving the app. It's not a generic calendar; it's a tracker built specifically for menstrual cup users.

Logging is simple: mark your period's start and end dates on an interactive calendar, and Shiro will analyze your entries over time to surface cycle insights and next-period predictions. The more you track, the more accurate those predictions become.

The Period Tracker is organized into three sections:

Overview — A summary of your current cycle status and your next predicted period.
Period Tracker — The main calendar where you log period days and view your full history.
Settings — Customize your preferences to match your unique cycle.

All tracking data is kept private to your account and is never shared. Creating a Shiro account is completely free.

Visit the Period Tracker to start logging and see what Shiro can surface about your cycle.

Having cup management and period tracking in the same place means fewer apps to juggle and a more connected view of your menstrual health — right where you need it.