Write whatever's in your head — a day, a sentence, a mess. Your phone works out what's in it, and what it follows depends entirely on what you write about: your sister, your thesis, a diagnosis, how it's going, your cycle. Then it comes back at the moment you'd want it to.
Built for women — for cycles that don't read the textbook, for the weeks that are held together by memory, and for everything nobody ever told you about your own body. Without once making you feel like a patient.
Free on iPhone. No forms to fill in, ever — and nothing you write is sent anywhere to be understood.
Got my period this morning, heavy. Long call with Mum, she's still not herself. Need to pick the kids up in two hours.
Worked out on the phone, as she typed, in a few thousandths of a second — and not sent anywhere. Note that "Mum" was never a category Narvita shipped with. Write about her enough and she becomes one of your threads; so does the thesis, the flat hunt, the thing you're not ready to name yet.
How it works
Every other women's health app asks you to translate your life into its forms: pick a flow level, tap a symptom, rate your mood out of five. You end up with a database that knows what you tapped and nothing about what happened — and an app you open to report on yourself. Three weeks a month it has nothing to say to you.
Narvita works the other way round. It has no fixed set of things it measures. It picks up what you actually say and builds around that, so what it follows for you is not what it follows for anyone else — your cycle is one of the things that falls out of keeping a journal, not the reason to keep one. All of the understanding happens in the app on your phone: there is no server anywhere that has read a word of your journal, because there is no copy of it to read.
Because it is one. No fields, no chips, no required anything. Underneath what you wrote, a quiet line shows what your phone made of it — tap any of it to see the exact sentence it came from, or to say it's wrong. Speak instead of typing if you'd rather; that's transcribed on the device too.

Narvita ships with no fixed set of things to measure. Write about your sister, your thesis, a diagnosis, a dog, and each becomes its own thread once it has turned up on enough separate days to be more than a passing mention. Nothing sits at the top because we decided it should: the page is ordered by what you write about, and it reorders itself as you change. If you write about your period, your cycle is one of those threads — it learns your real average instead of assuming 28 days, and it says how many times it has seen something before it will call it a pattern. If you never write about it, that section simply isn't there.

Every cycle app says the same thing to every woman: your period is four days late. To someone who is pregnant that's nonsense. To someone trying to conceive it's the cruellest possible phrasing of the thing she's already counting. To someone who miscarried last week it is unbearable. To someone in perimenopause it's simply wrong — her cycles aren't late, they're changing.
Write "I'm pregnant", or "we're trying", or that you lost a pregnancy, and Narvita changes what it says and what it asks. After a loss it stops asking about your cycle entirely for a while. It never guesses at any of this — a late period is never read as a pregnancy — and whatever it concluded is one tap away in Settings.

"Pick the kids up in two hours" becomes a reminder in two hours. "I need to book the smear test" gets asked about once, later, in your own words. And once you mention a period, it quietly checks in — still bleeding? — and asks again weeks later, on your own rhythm, when one is due.

A year ago today, you wrote this. And the thing no general journal can do: the last time you were around day 24, you wrote this. Put a date in — "presentation on the 14th" — and it tells you where that lands in your cycle, and what you've written the last few times you were there, with the count attached.
Women are told constantly that what they feel is unpredictable. Your own writing, laid against your own cycle, says otherwise: it's a week you've had before, and survived. That turns a hard stretch from evidence that something's wrong with you into something you can plan around.

Questions about you — am I late? is my cycle regular? what have you noticed? — are answered on your phone, from your own writing, and labelled as such. General health questions are answered only from vetted sources like MedlinePlus and the NIH, and shown with those sources. If nothing covers your question, it says so instead of guessing.

Privacy
This is a record of your body and your private thinking, at a time when that kind of data has been subpoenaed. So the answer isn't a promise — it's the architecture.
The one exception, stated plainly: when you ask a general health question, that question and a short summary of your cycle are sent to be answered. Never your writing. The app tells you this one tap from the Ask screen.
Pricing
Charging a woman to see what her own writing said about her health isn't a business model we're willing to have. So the line is simple: what stays on your phone is free, forever. What leaves it is Plus.
Forever
Monthly or yearly
Plus covers what genuinely costs money to run. Questions about your own writing are never counted — they're answered on your phone.