About
What if your period did not hurt? What if your PMS was not a reason to stay home all week? What if your cycle was no longer this crazy mystery?
The Baba Yaga app is a trusted holistic period tracking & fertility awareness app that helps you understand your body through your own observations and patterns. You track your period, cervical fluid, basal body temperature, and other body signals. Over time, these observations help you recognize your unique cycle patterns and understand how to live in sync with them.
Baba Yaga does not watch, judge, or optimize you… Instead, she sends you meaningful support through daily hormone powers and coaching content created by real people, written in the voice of the Baba Yaga archetype of empowerment herself. She is your personal cheerleader-coach-fairy-godmother, the teacher you wish you had when you first got your period, and the little empowerment guide in your pocket for when you just don’t know what’s going on in your body.
The best part? Your data stays safe. It is a private space to learn how your body works. The app is designed to help you build self-knowledge and self-trust from a place of empathy and belonging.
The app exists inside of the greater hybrid health–ritual ecosystem and is its core tool: a privacy-first, feminist, independent health technology built under strict European data protection standards. No data selling. No surveillance advertising. No extractive design.
Through the app and educational platforms on Substack, Baba Yaga functions as a menstrual education authority — teaching accurate, evidence-informed cycle literacy, fertility awareness (ovulation detection using bio markers), and reproductive health grounded in real biological signs.
This work exists within a broader commitment to body sovereignty: the right to understand, track, and make decisions about one’s body safely and without coercion.
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Baba Yaga is a witch from predominantly Slavic folklore. Too often, she is demonized, shamed or turned into an evil thing, not unlike the menstrual cycle itself. But at the core of her lore is a figure of true confidence and wisdom. In her famous collection of myths and storytelling “Women Who Run With the Wolves,” the author, Clarissa Pinkola Estés, excavates the truth of Baba Yaga: She is an archetype of initiation, empowerment, and the cycle of life. Similarly often shamed or hidden, the menstrual cycle can be a rite of passage, a source of our greatest strengths, and a constant reminder of the ongoing cycle of life.
In that way, the Baba Yaga’s voice permeates the app: you will receive little notes and notifications from her, she’ll guide you through the ups and downs of your cycle phases, and you’ll learn how to attune to your own unique natural rhythm with more ease and spaciousness. When we shift our perception from nuisance to inner clock (not unlike the wheel of the seasons or the moon phases), we can re-orient to our biology from a whole new place of self-trust and self-knowledge. A tool like the Baba Yaga (both the archetype and the app) is a powerful guide on that journey.
Because we believe in a world in which all beings are aware of their innate connection to the natural cycles of life.With the Baba Yaga app we strive to empower every-menstruating-body in the world by providing the tools to listen to and understand what our bodies are telling us.Support the Baba YagaNatalie Stoemmer
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It all started with this simple frustration: trying to understand what’s going on in my body while also juggling multiple work appointments, a private life, and my personal healing journey. Too many things to keep track of, too many open questions, too little trustworthy information. ”
Natalie is a co-creator of the Baba Yaga app and used to suffer from pretty serious period cramps. Supporting herself through each of her cycle phases, learning about her hormones, and figuring out what works best for her unique cycle patterns, made her want to share this practical tool of self knowledge with others. And so the idea for the Baba Yaga app was born.
She is a menstrual health educator and coach. Her work integrates evidence-informed menstrual education with ethical, privacy-conscious health technology. She approaches reproductive health through the lens of body sovereignty, consent, and non-extractive design.
HP Dietz
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This is where I come in. I knew there weren’t many great, female-led period apps out there and while I didn’t know much about the menstrual cycle, I did know I had the technical skills to support my partner on her mission. ”
Hans-Peter is responsible for the technical foundation and security of Baba Yaga. He designs and builds the systems behind the app, with a focus on stability, usability, and privacy-conscious infrastructure. His background in software development and distributed systems supports a long-term, thoughtful approach to building technology.
His role ensures that the ideas behind Baba Yaga are not only conceptual, but fully realized in how the product works.