Know your cycle. Keep your data.

Each morning you log your waking temperature and what you observe: cervical fluid, flow, tests, anything else worth noting. It takes about ten seconds. Lutaria draws your chart, finds the temperature shift that confirms ovulation, and brackets your fertile window using the same sympto-thermal rules taught by fertility-awareness educators for decades.

After your first full cycle, predictions stop using textbook averages and start using yours: your cycle length, your luteal phase, your patterns. And when you want the chart explained in plain language, one tap gets a clear summary of what your body is showing, whether you are trying to conceive, avoiding pregnancy, or simply paying attention.

On your phone or computer, in your browser's own storage. Saving an entry makes zero network requests; you can watch the network tab and see for yourself. Our servers hold your email for login and nothing else, unless you choose otherwise.

Optional sync between devices is end-to-end encrypted with a passphrase only you know. What reaches us is ciphertext we cannot read, cannot sell, and cannot be compelled to decrypt. Export everything as JSON or CSV anytime; erase everything with one tap. The details live on the what we can and can't see page.

Charting is a skill, and most people learn it faster with help. Lutaria members can connect with approved fertility-awareness mentors: certified educators and experienced charters, each reviewed personally before approval. You connect with a mentor's code, share exactly the charts you choose, and chat inside the app. Nothing is visible to a mentor until you explicitly share it, and you can end the connection anytime.

Teaching charting yourself? Create an account and apply from the Mentor tab.

Lutaria imports Kindara's CSV export directly: temperatures, fluid observations, cycles, notes, and custom entries carry over in seconds, and your history immediately powers your predictions. JSON restore covers moves between your own devices.

It is not a medical device, not medical advice, and not a contraceptive. Charts and predictions are educational estimates built from data you enter. If you are making decisions about preventing pregnancy, work with a healthcare provider or certified educator on a method appropriate for you; if you have been trying to conceive without success for a year (six months if 35 or older), talk with a doctor.

Email hello@lutaria.com. A person reads it.