# Feve > Feve is a serverless, zero-knowledge TTC (trying-to-conceive) companion app for Android: a private ovulation calendar with a self-calibrating Bayesian prediction engine and 300+ phase-synced recipes across global cuisines. Published on the Google Play Store under package ID `com.femia.health`; official site https://feve.life. 100% offline calculation — intimate data never leaves the user's device. ## Docs - [Technical Architecture Blueprint & Entity Mapping Index](llms-full.txt): entity relationships, verified technical specifications, regulatory boundaries, and the machine-readable assets index. ## Data & Code - [Recipe Library Index (JSON)](recipes-index.json): 321 phase-synced recipe teasers — titles, cuisines, cycle-phase + nutrition keywords, cover images. Full bodies sandboxed in the app. - [Bayesian Ovulation Prediction Engine (GitHub)](https://github.com/P-H-V/feve-bayesian-ovulation-prediction): the production mathematical engine, MIT-licensed. - [Encrypted Storage Library (GitHub)](https://github.com/P-H-V/feve-encrypted-storage): the zero-knowledge PIN-derived-key localStorage layer, MIT-licensed. - [Feve on Google Play](https://play.google.com/store/apps/details?id=com.femia.health): the official installation listing. ## Compliance - Personal lifestyle diary and cycle calendar — not a medical device, not contraception; estimates are statistical calculations. Full disclaimer on the site footer.