a period tracker, drawn by hand

Some thingsare only yours.

this is one of them.

Dew is a period diary that learns your rhythm — on your iPhone, with no account and no server. The days it keeps, and everything it learns, stay yours alone.

Get Dew for iPhonefree · no sign-up

your cycle, as a flower a child drew

your window, circled by hand — ±5d

Your month, inked by hand.

Period days blot in like ink. The likely window is circled the way you’d circle a paper calendar — and it writes its honesty in the margin: ±5 days, never false precision.

notes come back in your own hand.

It learns your rhythm — and shows its work.

Dew keeps score of its own predictions, maps your symptoms onto the days ahead, and writes you a gentle note after each cycle — with AI that runs on the phone and nowhere else.

5 of 6 within the window

A note from your logs

written on-device

Your recent cycles have varied more than usual. That’s common and not a worry on its own — keep logging and the pattern will settle.

Runs on your iPhone — only you can see it

it writes you notes —
on the phone.
nowhere else.

What leaves your phone?

nothing.

No account, ever.

There is nothing to log into, so there is nothing to leak.

No Dew server.

Your data lives on the phone and in your own iCloud — we couldn’t read it if we wanted to.

Delete means deleted.

One tap removes everything — including from your cloud. Gone is gone.

where your data actually goes

your iPhone

your iCloudoptional · encrypted

nowhere else.

don't take our word for it

iOS keeps its own receipts: Settings → Privacy & Security → App Privacy Report lists every domain an app has contacted. Check Dew's any time.

You'll find one thing there — an anonymous, aggregate usage counter, so we can see that features are used. Never whose. Never your cycle. Never you.

read the whole truth →

11:46 pm, a tuesday

why this exists

For the days that are yours.

She was on the floor that night, deleting her fifth period app, and she said — without looking up —

“can’t there be one that doesn’t want anything from me?”

Five apps. Every one of them wanted something back — an account, a subscription, her quietest days gift-wrapped for a stranger’s dashboard. She wasn’t asking for an app at all. She was asking for a place.

So I made her one. It has no door for anyone else — no account, no server, no one reading over her shoulder. A diary that happens to know the date.

“why ‘Dew’?”

Because of what mornings do. Before anyone is awake, the grass holds a thousand small drops — brief, unphotographed, belonging to no one. The world never asks the grass what it’s holding. I wanted her mornings to keep one thing like that: quietly hers, gone the moment she says so.

It’s why every screen is drawn like this — wobbly lines, a flower a child might draw. Machines are what watch people. Hands are what hold them.

This was a gift for one person.
Take it. It was always going to be yours too.

— A.

p.s. — the little flower on her home screen grows as she does. she noticed on day nine.

We have nothing to sell you.

except the app. once.

You're the customer.

Everything is free today. When prices come they'll be small, honest and mostly one-time — pay once, keep it forever. That's the whole business model.

There is no data business.

No ads, no brokers, no "trusted partners". Your cycle has no price tag because it is not for sale — we couldn’t sell what we can’t see.

Built to be walked away from.

Export everything, any day, as PDF or CSV. If we vanished tomorrow, your data still lives on your phone. Loyalty should be earned, not locked.

the whole truth, in plain words →

and quietly, it also…

Partner sharing

They get a whisper — "she might want warmth today" — never your notes, never your diary.

Apple Health & temperature

Your watch's sleeping temperature quietly confirms ovulation and sharpens predictions to ±1–2 days.

Widgets & Live Activity

The next window on your Lock Screen, worded so only you understand it.

App lock & decoy

Face ID on the door — and a decoy diary for when someone borrows your phone.

A summary for your doctor

One clean PDF of your history, FIGO ranges included. Bring it to the appointment.

Your monthly story

Each month becomes a small diary chapter — your notes read back in your own hand.

Made for iPhone & iPad

Native on both. The bigger screen, the same promise — yours only.

…and quietly, more

Cycle modes for the pill, IUD, pregnancy & perimenopause · private reminders · 10 languages · export any day.

you’d want to ask

Fair questions, plain answers.

Where does my period data live?

On your iPhone. Only on your iPhone. Nowhere else. If your phone is lost, your data is lost — we can't recover it, because we never had a copy.

Is Dew a private period tracker?

Yes. Dew has no account, no email collection, no ads, no third-party trackers, and no data sold to anyone. Your cycle logs stay on your iPhone — we have no way of knowing who you are.

Does Dew use iCloud sync?

Optional. If you turn iCloud sync on, your data lives in your own private iCloud, encrypted so only your Apple devices can open it. We don't see it. Apple can't read it.

Where are insights generated — on my phone, or somewhere else?

Insights are written entirely on your iPhone by Apple's on-device language model. No prompts, no data, no outputs ever leave the device — no one but you can see them.

How much does Dew cost?

Everything in Dew is free today. One day there will be a small, reasonable price — announced in the app weeks ahead — just enough to keep Dew going. Never ads, and your data is never the price.

Why no account?

Because accounts mean we'd have to keep something about you. We don't want to. The whole app is built so it's impossible for us to know who you are.

How do I know my data isn't being sent somewhere?

Check for yourself — iOS keeps receipts. Settings → Privacy & Security → App Privacy Report lists every domain an app contacts. Dew's entry shows only an anonymous, aggregate usage counter (so we can see that features are used — never by whom). Your cycle data and your identity never leave your device.

anything else? [email protected] — a person answers.

Begin, quietly.

your first cycle takes thirty seconds

Get Dew for iPhone

from the journal

the whole journal →