How does Dew know how accurate it's been?

Every time Dew predicts a period, it quietly remembers the date. When your real period arrives, it compares the two — entirely on your device. The new accuracy card in Insights simply surfaces that track record: how many of your recent cycles landed inside the predicted window, and how close it usually was. It only appears once there's enough history to be honest (about three resolved cycles), and never overstates the result.

Does Dew use AI now? Is my cycle data sent anywhere?

Dew uses Apple's on-device intelligence to write gentle, plain-words explanations — like why your next period lands where it does, or a warm reflection in your Story. It runs entirely on your iPhone; nothing about your cycle is ever sent to a server. The AI only ever explains; it never makes the prediction. Every number you see comes from Dew's deterministic math, and the wording is checked so it can't contradict those numbers.

What's in the summary for my doctor?

It's a clean, one-page PDF you can export from Settings and share at a visit. It frames your cycle facts against the ranges clinicians actually use — FIGO System 1 and ACOG normal ranges — marking each parameter (cycle frequency, regularity, period length, flow, spotting) as in-range or worth a mention, alongside a cycle-length trend chart, your symptom-and-phase patterns, and Dew's prediction. You choose when to create and share it; it never leaves your device on its own.

What can I share with a partner now?

If you choose to share your cycle, Dew 1.1.1 now also carries the custom moods and symptoms you've created yourself — your own words, not just the built-in set. There's also a new per-share Notes toggle, off by default, so you can optionally share a day's written notes with that one person, or keep them completely private. Sharing stays one-way and on-device, and nothing changes unless you turn it on.

Did anything change about my privacy?

No — everything in Dew still lives on your phone, synced only through your own private iCloud, with no account, no tracking, and nothing sold or shared. The new intelligence runs on-device; the doctor summary and Story are built and shared only when you choose. This update adds a dedicated page explaining exactly how Dew's on-device AI works, too.

What's new in Dew 1.1.1 — trust you can see, and a year you can hold

A tracker asks you to trust it every month — but never shows its work. Dew 1.1.1 is about making that trust visible, and turning your months into something worth keeping.

Dew 1.1.1 is here. Where 1.1 was about fitting more of life, this one is about a quieter problem — the one that makes people slowly stop believing their tracker. It starts with something we could see in the numbers, and ends with a private journal of your own months.

The thing nobody keeps score of

Every period tracker asks the same thing of you: trust me. It shows a date, you plan around it — and then the day comes and goes and nobody writes down whether it was right. There’s no scoreboard. So when a prediction feels off once, the doubt sticks, and there’s nothing to weigh it against.

It’s a bit like a weather app that never tells you how often it was right. You’d stop trusting the forecast too — not because it’s bad, but because you can’t see that it’s good.

Dew has actually been keeping score the whole time. So we decided to show it.

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recent cycles landed inside Dew’s predicted window.

Usually within a day. This number always existed — Dew just never showed it to you. Now it does.

Trust you can see

Three small changes, all pointed at the same goal — letting the prediction earn your trust instead of just asking for it.

How close Dew’s been. A calm new card in Insights shows your real track record — how many recent cycles landed inside the predicted window, and how close it usually was. It appears only once there’s enough history to be honest.
Why this date. A plain-language line now sits atop the prediction: your rhythm, how steady it’s been, a temperature-confirmed ovulation. It explains the forecast in words a friend would use.
What’s likely coming up. The Patterns card now looks forward — projecting a symptom that clusters in a phase onto its next date (“cramps · likely around Tuesday”). Hedged, gentle, and quietly hidden whenever your cycles are shifting.

Why this date

“Your cycles have been steady at about 29 days, and a small temperature rise last week suggests you’ve already ovulated — so your next period is most likely around Tuesday the 14th.”

The words explain. The math predicts — and every number stays exact, computed on your device.

One rule held the whole time: the AI only ever explains — it never predicts. Every number comes from Dew’s math, computed on your iPhone, and the wording is checked so it can never contradict the figures underneath.

Your Story — a year you can hold

Then we asked a different question: after months of quietly logging, what do you get back? So we built Your Story — a full-screen, private journey through your own months. Not a list. A story: the Dew spiral draws itself in, your counts settle, and each month becomes a chapter with a warm, on-device reflection and your days as quiet vignettes.

A story, not a list

Month by month, the spiral draws itself in and your days settle into quiet chapters — with a warm, on-device reflection for each.

How you move through your cycle

A radial mood map places what you feel by phase — “in your luteal days, you most often feel…”. Presence shown by weight, never colour.

On this day

When a day rhymes with one about a cycle ago, Dew quietly resurfaces your own past note — your months, connected.

It knew

A gentle beat near the end shows a time Dew’s prediction matched your real period — shown only on a genuine hit, so it never overclaims.

When a cycle completes, Dew sends one calm note — “Your month is ready.” — and tapping it opens the new chapter. You can end on a keepsake built from your real data and share it, if you like. It lives entirely on your phone; you reach it from Insights and Calendar.

A summary for your doctor

Cycle questions have a way of vanishing the moment you’re in the room. So Dew can now export a clean, one-page PDF summary for a clinician — your cycle facts framed against the standards doctors actually use (FIGO System 1 and ACOG normal ranges), with an in-range vs. “worth a mention” marker on each parameter, a cycle-length trend chart, your symptom patterns, and Dew’s prediction and accuracy. It’s honest by design: in an off-cycle mode it says plainly that the figures reflect prior history. You choose when to make it and who sees it.

Closer sharing

If you share your cycle with someone, it now carries the custom moods and symptoms you create yourself — your own words, not just the built-in set. And a new per-share Notes toggle (off by default) lets you optionally share a day’s written notes with that one person, or keep them entirely private. One-way, on-device, and only ever what you turn on.

Under the hood

None of the above matters if the prediction itself drifts, so most of this release went somewhere you’ll never see: the engine. We fixed a set of wrong-date edge cases (Dew will never surface a predicted date that’s already in the past), improved accuracy on longer cycles, and grounded how a period is detected in clinical guidance — a spot of light spotting no longer starts a new cycle. The calendar’s opening animation was tamed too, so switching modes no longer replays it.

Still yours alone

Everything new here — the intelligence, the Story, the doctor summary — runs and is built on your device. It’s synced only through your own private iCloud, with no account, no tracking, and nothing sold or shared. This update even adds a dedicated page explaining exactly how Dew’s on-device AI works. By design.

Curious how the forecast actually works? We wrote the honest version here. Dew is free on the App Store below.

And if there's something you wish Dew did — or something that's not quite right — we genuinely want to hear it. Since we don't track you, your words are the only way we learn. Tell us what you think. It's two minutes and completely anonymous.