Fourteen things, and what each one costs.

Lumie weighs your last twelve cycles, the recent ones heaviest, and gives you a range of days rather than one confident looking date. Under that range sits a confidence level she has to earn. Below two cycles, or when your history swings too widely, she says she is still learning instead of inventing a day for you.

The number in the middle is your cycle day. The ring around it is the whole cycle at a glance: what has already happened, where you are now, and what she expects next. Under it are the two dates most people open the app for, the next period and the fertile window, each with the honest caveat attached rather than buried.

Long cycles are kept, not discarded. Anything from a short cycle to a ninety day gap counts as real data. That matters if you have PCOS, have just come off a method, are post partum, or are simply irregular and tired of apps that treat that as an error.

On the pill, the patch or the injection, ovulation is suppressed, so the fertile window is hidden entirely rather than guessed at. Lumie is not a contraceptive and does not pretend to be one. Where the app has to make an assumption, such as the fourteen day luteal phase every tracker uses, it prints the assumption next to the answer.

Cycle length

21 to 45 days, and history back 400 days

Weighting

Up to 12 cycles, recent ones count most

Confidence

Earned on logged history, never on payment

Runs

Entirely on the phone, offline

Bleeding, flow, mood and energy are on screen. Everything else sits behind a single “add more detail” control, and it opens itself if the day already has some. A quick day stays quick and a heavy day is never a hunt.

Thirty eight symptoms across seven groups, and each one takes a severity and an impact. Whether it was mild or severe is a different question from whether it stopped you doing something, and only the second one tells a doctor much. Tap a symptom to log it, hold it to say how bad it was.

Every optional answer can be un answered. Tap the chosen chip again and it clears, including the severity and any note you attached to it. Nothing you record is a one way door.

There is one Save, never a per step commit, so a half finished sheet cannot overwrite a real entry. And from the home screen the four quick tiles deep link straight into the section they name, so logging a mood is two taps rather than a scroll.

Bleeding

Flow, plus three heavy flow follow ups

Wellbeing

Mood, energy, sleep, stress

Fertility

Basal temperature, LH tests, discharge

Yours

Medication, your own tags, a note

Not “remembers” as a feature word. She brings up the symptom you logged yesterday, what was happening on this same cycle day one cycle ago, and a symptom that keeps landing in this phase, with the count attached, so you can tell whether four out of six is a pattern or a coincidence.

She reads what you actually wrote, not just the labels you tapped. If you noted that a bad day was about a row at home rather than about your body, she has that too, and she will not explain your feelings away with hormones. That is a rule in her prompt, not a hope.

The conversation is kept for good, on your phone, and it is the same memory whether you typed it or said it out loud. Incognito turns the writing off while she can still read: she keeps up with the conversation, and nothing new is stored.

She answers in the language you set the app to, English or Hinglish, and follows you if you switch mid conversation. Five conversations a day are free. Premium removes the ceiling.

If you say something that sounds like a crisis, she stops being a chatbot. No model is called at all. You get a card with a real helpline you can dial, and it recognises the words in both scripts people actually type them in, not only in English.

What you log is encrypted on the phone, under a key the phone itself holds. Cloud backup is off until you turn it on, and it is the only thing that ever sends any of it anywhere.

Your rows are filed under a one way hash of your account, made on our server from a secret your phone never sees and cannot compute. There is no email column, no phone number, no address book. Even we cannot look up a person by name, because the name is not in the shape of the data.

App Lock starts locked, so no frame of your data is on screen before you have unlocked it, and it hides the app from the recent apps carousel too.

Lumie's use of your context is a switch as well. Turn it off and everything stays on the phone. Crash reports and usage counts are separate switches again, they are named on the privacy screen during setup rather than buried, and neither ever carries your cycle, your logs, your notes or your chats.

You can take everything out as a CSV, and you can delete it, the device copy, the server copy, or the whole account, as three separate decisions. The privacy policy spells out exactly what leaves and when, and you can delete your account from here without installing anything.