Harnessing lunar rhythms to redefine fertility tracking
Moonchild is a US-based menstrual and fertility tracking app that helps women align their cycles with the phases of the moon. Created by a woman founder, the app combines lunar awareness and reproductive health in a simple, intuitive platform.
Making complex lunar and fertility calculations accurate and accessible.
The vision for Moonchild was ambitious: combine lunar rhythms with fertility science to create a cycle tracker unlike anything else on the market. But turning that vision into reality required overcoming multiple technical and design roadblocks.
Accuracy was critical, since even small errors could break user trust. The app had to calculate fertile windows, periods and moon mandalas with research-backed precision while processing over 500,000 records. Predictions also needed to adapt across time zones and remain consistent for a global audience. At the same time, the founder wanted the experience to feel empowering and simple, turning complex lunar data into clear, actionable insights.
From idea to launch through full-cycle collaboration.
We worked with Moonchild to build a complete digital ecosystem. The Android app was developed in Kotlin and XML, while the iOS app was built in Swift. A Python backend powered the intensive fertility and lunar calculations, and Angular was used for both the website and the admin panel, giving the founder full control over users and data.
The development journey began with wireframes that mapped each feature and user flow. These evolved into high-fidelity Figma designs, balancing data depth with usability. Weekly sprints and regular check-ins kept progress transparent, with features tested and refined in real time to match the founder’s vision.
From vision to adoption: Moonchild’s successful market launch.
Moonchild launched in the US as a fully functional mobile and web app that immediately connected with its target audience. Within the first months, the app gained 6000+ active users with strong conversion rates from free to paid subscriptions.
The platform delivered accurate cycle and fertility predictions tied to lunar phases, turning years of research and planning into a product women could rely on. Beyond adoption, Moonchild established itself as a unique entrant in the fertility tech space. Regular support ensured that complex features like moon mandalas and time-zone compatibility were implemented seamlessly. By launch, the app not only met but exceeded expectations, turning a long-time dream into a trusted health tool.
