Answers

Is there a migraine app that doesn't require an account?

Yes. Dim is a migraine diary for iPhone and Apple Watch that never asks you to sign up — no email, no password, no profile — because your history is stored on your device and in your own private iCloud, not on a company server.

Updated August 2026 · 5 min read

Why most health apps demand a signup

Open almost any headache or symptom tracker and the first screen is a registration form. It feels like a technical necessity, but most of the time it isn't. A personal diary — dates, symptoms, notes — can live entirely on your phone. The account exists for other reasons:

• Your data is the product. Many "free" health apps are funded by advertising or by selling aggregated, "anonymized" health insights. An account ties every entry to a stable identity, which is exactly what makes that data valuable.
• Marketing. An email address means newsletters, win-back campaigns, and upsell messages. Without one, the company has no channel to you.
• Server-side sync. This is the one honest reason — if the app stores your diary on its servers, it needs a login to know whose diary is whose. But on iPhone, Apple's iCloud already syncs private data between your devices without the developer ever seeing it, so a personal-use app simply doesn't need its own cloud.
• Investor metrics. "Registered users" is a number startups report. You become a row in a growth chart the moment you type your email.

None of these reasons benefits you as a person having migraine attacks. And with health data specifically, the stakes are higher than with, say, a to-do app: a headache diary can reveal medication use, menstrual patterns, sleep problems, and how often you're too ill to function.

What "no account" actually means for your privacy

A migraine app without an account changes the situation structurally, not just as a policy promise:

• There is no server copy to leak. Data breaches happen to careful companies too. If your diary was never uploaded to a developer's database, it cannot appear in one.
• There is nothing to sell. A developer who never receives your entries cannot share them with advertisers, data brokers, or "partners" — even under pressure, even after being acquired.
• Your identity and your symptoms stay unlinked. Without an email or profile, your attack history isn't attached to a name anywhere outside your own devices.
• The app keeps working on its own. No login server means no forced logouts, no "service discontinued" emails locking you out of your own history.

Privacy policies can change; architecture is harder to walk back. That's why "does it require an account?" is one of the fastest questions for judging any health app — we cover the rest in what to check before trusting a migraine app.

How Dim works without one

Dim was built around the assumption that a migraine diary is nobody's business but yours and, if you choose, your doctor's. In practice that looks like this:

• You download the app and start logging. There is no registration step to skip — it simply doesn't exist.
• Attacks are logged in three taps, in a near-black interface designed for light-sensitive eyes, and details can be filled in later.
• Weather, temperature, barometric pressure, and last night's sleep are attached automatically, using local data sources and Apple Health on your device.
• Everything stays on-device and in your private iCloud. No ads, no analytics resold, nothing shared with anyone.
• When you need to show a clinician your history, you export a PDF or CSV yourself and hand it over — the sharing decision is entirely yours.

The core diary is free. Dim Pro, a subscription with a 7-day trial, unlocks the doctor report, Apple Watch logging, widgets, and insights — and even then, payment goes through the App Store, so Dim still never learns your name or email.

Does going account-free cost you anything?

Honestly, a little. There's no web dashboard you can open from any computer, and no way for the developer to recover data for you, because they never had it — your iCloud backup is the recovery path. If those trade-offs matter more to you than keeping your health history off company servers, an account-based tracker may suit you better. The NHS recommends keeping a migraine diary either way; what matters most is that you actually keep one, in whatever form you trust.

A diary that never asks who you are

Dim logs an attack in three taps and keeps your entire history on your device and in your private iCloud. No account, no ads, nothing sold.

No account · No ads · Nothing sold