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?

Dew is free during v1. When pricing arrives in v1.1+, there will be a small one-time price for core tracking and a small monthly Pro tier for advanced features. Both are honest. No surprises, no dark patterns.

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.

Period trackers that work without an account

Five period trackers that don't ask for an email, a password, or a profile. What each stores, what it doesn't, and which one to pick if you want the app to never know your name.

Most period apps want an account. They'll dress it up — "to sync your data," "to save your progress," "to personalize predictions" — but the function is the same: attach your cycle to an email address and store both on a server.

It doesn't have to be that way. Below are five period tracker apps that work without an account: no email, no password, no sign-in screen. You install, you open, you log. The app doesn't know who you are.

Why no-account matters

An account is the join key between you and your data. Without one, the app can't tie a cycle pattern to a real person — even if the company wanted to. With one, every entry is attached to your identity, and that pairing usually lives on a server you don't control.

No-account apps fall into two shapes: local-only (data stays on device) and local + private-cloud (data syncs through your own encrypted iCloud or Google Drive, never through the app's server). Both are safer than the standard "email + cloud account" pattern.

The five

1. Dew

Platforms: iOS. Sync: Optional, through your own iCloud Private Database.

No sign-up screen exists. You install, hit the onboarding ("how long is your cycle," "when was your last period"), and you're tracking. Your data lives in a local sqlite-data file and, if you've enabled iCloud sync, in your own end-to-end-encrypted iCloud database. Dew has no server, no account system, no "forgot password" flow because there's nothing to forget.

Best for: iPhone users who want a calm, real diary (mood, symptoms, notes) without ever signing up for anything.

2. Apple Health Cycle Tracking

Platforms: iOS / watchOS. Sync: End-to-end encrypted iCloud (no separate account — uses your Apple ID).

Built into iOS in the Health app. No third party involved. Apple has stated publicly that cycle tracking is in their "extra-sensitive" category and is end-to-end encrypted even from Apple itself.

Best for: Anyone who already uses Apple Health and wants the simplest possible tracker.

3. Euki

Platforms: iOS / Android. Sync: None — fully offline.

Euki is the most aggressive about no-account: there's not even an optional cloud. The app can disguise itself as a calculator on your home screen and requires a PIN to open. Built for users in jurisdictions where cycle data is being subpoenaed.

Best for: Maximum-privacy users. Trade-off: You lose everything if your phone is lost or wiped.

4. Drip

Platforms: iOS / Android. Sync: Optional encrypted backup to your own iCloud or Google Drive.

Open-source, no account. Optional backup that you password-encrypt yourself. The code is on GitHub if you want to audit it.

Best for: Open-source preferrers and Android users.

5. Lily

Platforms: iOS. Sync: Local-only.

A minimal indie tracker. No account, no marketing. Single-purpose: log periods, get a calendar back.

Best for: Users who want the absolute simplest no-account option. Trade-off: Sparse symptom/mood logging.

How to pick

You want a full diary (moods, symptoms, notes) and you're on iOS: Dew.
You want basic tracking and you already trust Apple Health: Apple Health Cycle Tracking.
You want maximum legal protection from subpoena: Euki.
You're on Android or want open source: Drip.
You want the absolute simplest no-account option on iOS: Lily.

One small note about "no account" claims

A few apps say "no account required" but quietly identify your device with an advertising ID or a generated UUID. That's still a join key, just one the user doesn't see. The five above don't do that.

If you're unsure: check the privacy policy for "device identifier," "advertising ID," "IDFA," or "anonymous identifier." Any of those means the app is tracking you without an account, which is the same thing as having one.

For a deeper look at which trackers also avoid selling data, see How to find a period tracker that doesn't sell your data.