Rheya

A gift for the early bloomers: the first thousand to arrive receive Rheya Premium for life. No subscription, ever.

Your rhythm, privately understood.

Rheya is your Private Cycle Companion — a refined period tracker and menstrual calendar designed around privacy and clarity.

Track your cycle, ovulation and fertility in a calm, beautifully structured space.

Whether you’re monitoring your period, understanding ovulation windows or following your fertility journey, Rheya supports modern women with clear insights and elegant simplicity.

Pregnancy Mode introduces symbolic growth visuals, milestone tracking and a beautifully designed “Baby Is Here” share card — making your pregnancy journey memorable.

Your data stays yours.

Rheya is built with private cycle handling at its core — no unnecessary tracking, just a secure and intentional experience for women’s health.

A modern cycle calendar designed for clarity, confidence and privacy.