About Us

Period Calculator Pro was founded on a simple but powerful principle: your health data belongs to you.

Our Mission

In an era where personal data is often treated as a commodity, we wanted to build a suite of tools that women and menstruating people could trust implicitly. Most period tracking apps collect sensitive health information and store it on remote servers. We chose a different path.

Privacy by Design

Our tools are built with "Privacy by Design." Every calculation happens right in your own browser. We don't have a "cloud" because your data never leaves your device. This means there's no data for us to sell, no data for hackers to steal, and no data for anyone else to see.

Accuracy and Empowerment

Beyond privacy, we focus on accuracy. Our algorithms are based on established menstrual cycle science, helping you predict your next period, understand irregular patterns, and estimate fertile windows with confidence. We believe that when you understand your cycle, you are empowered to make better decisions about your health and your life.

Free and Accessible

We believe reproductive health tools should be accessible to everyone. Period Calculator Pro is free to use, requires no account creation, and works on any device with a web browser.

Thank you for choosing Period Calculator Pro. We are honored to be part of your health journey.