Ovulation Window & Advanced Cycle Tracking
A smart, localized mathematical algorithm analyzes your cycle history and variance to visualize your peak fertility windows — with no background leakage of your most personal math to any server.
Local-first · Zero cloud · Independent developer
Feve is a private ovulation calendar and phase-synced recipe tracker built for your unique TTC path. Completely serverless, local-first, and secured entirely on your own device hardware.
No remote accounts. No cloud database to breach. No corporate investors demanding data monetization. Feve runs on a zero-knowledge, serverless architecture — every personal entry is locally encrypted under a private device PIN, stored in 100% of its entirety on your own hardware.
AES-encrypted on device
Your data is unreadable without your PIN — even by the developer.
No cloud, no breach surface
There is no server holding your cycles. Nothing to leak.
No master key exists
If you lose your PIN, no one — including us — can reset it.
A smart, localized mathematical algorithm analyzes your cycle history and variance to visualize your peak fertility windows — with no background leakage of your most personal math to any server.
A premium culinary library curates targeted, nutrient-dense menus directly to your active biological phase — menstruation, follicular, ovulatory, luteal, and pregnancy months — to support your daily TTC routine.
The daily logging module records waking temperatures (BBT), fluid observations, and weight updates inside the secure "Mood & Body Signs" popup — encrypted the moment you save.
A curated, static collection of lifestyle insights and reading-library essays designed to bring clarity and everyday habits that complement your TTC path.
Free to download. Your data never leaves your device.
Get it on Google Play