Case Study: 28X achieves privacy-first, clinically accurate period tracking with Kyan

28X builds a privacy-first women’s health app with Kyan and a new technical blueprint

28X, a women's health app, faced the challenge of creating a service that prioritized user privacy and data control, breaking away from the common industry model of trading personal data for app functionality. They partnered with the digital product agency Kyan for app development, branding, and to build a mobile app that could track menstrual cycles with clinical accuracy without sharing user data.

Kyan designed and built a privacy-first architecture where all user data is stored locally on the device and fully encrypted. They created a unique digital experience featuring a visual, Tamagotchi-style butterfly companion that evolves with the user's cycle. The result was a new technical blueprint for privacy-first health apps. Kyan's work was instrumental in bringing the product to life, earning praise from the client's CEO for translating complex ideas into a beautifully executed product.

28X