In an era where health data is increasingly commodified, tracked, and exposed in data breaches, personal data privacy isn't just a bonus feature — it's a fundamental requirement.
Most period and cycle tracking apps require cloud accounts, transmit deeply intimate health telemetry to remote servers, and integrate third-party ad SDKs. When data lives on a central server, it is vulnerable to leaks, corporate sales, and subpoenas.
We asked a simple engineering question: What if the server simply didn't exist?
That philosophy led to Mooneva Cycle — a 100% offline-first, private, and open-source (GPL-3.0) period & cycle tracker built for web, iOS, and Android.
Our design rule from day one: Data that never leaves the user's device cannot be leaked or compromised.
