28X Private Period Tracker

A private, free period tracker designed for every life stage. The world’s first free to use, privacy safe women’s health app. Track your cycle with all data stored on your device. Your health is yours, and so is your data.

28X is a global, free, and privacy first women’s health app designed to support every woman and girl, everywhere. Your cycle information and symptoms stay securely on your device. Never shared. Never sold. Never stored in the cloud. No subscriptions. No locked features. No data monetisation. Designed with intention, 28X creates a calm, beautiful space to understand your cycle, whether you are tracking for the first time or managing your health long term. To keep 28X free for everyone, we offer an optional, entirely voluntary pay it forward feature that helps fund development and supports women and girls in vulnerable communities worldwide. Periods are better on 28X.

Track Your Cycle Simple, private period and cycle tracking for every life stage. Whether you are 13 or 50, from first periods to perimenopause and menopause, 28X helps you track what matters to you.

• Period and cycle tracking
• Clear menstrual phase predictions
• Mood, PMS, energy and symptom logging
• Patterns you can actually understand Track privately, with all data stored on your device

Learn Women’s Health 28X helps you understand your body with supportive, clinically informed content designed to be clear, accessible, and empowering. Learn about:

• Hormones and cycle phases
• PMS and monthly changes
• Endometriosis and PCOS support
• Perimenopause and menopause
• Skin, mood, and energy shifts
• Nutrition, lifestyle, contraception, and fertility
• Knowledge made simple, without judgement or overwhelm.

Privacy first by design Your health data stays with you.

• All data stored on your phone
• No cloud storage
• No tracking or profiling
• No ads or paywalls to unlock insights Health tracking built around you, not your data.

For Everyone, Everywhere 28X is free, global, and inclusive. Designed for all backgrounds and life stages, from first periods to menopause. Understand your body without giving up your privacy.