Migraine diary · iPhone
Nagi logs an attack in three taps, lines it up with your sleep, the barometric pressure and your cycle, then builds the report your neurologist asks for. Your data stays on your phone.
Coming soon to
Google Play
Most tracking apps ask for twelve fields while you are in pain — at the exact moment when you can't read, can't think, and can't stand the light of the screen.
Nagi does the opposite. Two pieces of information are enough to log an attack: the time and the intensity. The screen turns dark on its own, the animations stop. Everything else can wait until you feel better.
Features
Three taps flat
Set the intensity with your finger, tap the location on a body outline, and it is saved. The interface switches to dark and motionless on its own as soon as an attack is under way.
Dark background, lowered contrast, zero animation, large buttons. Built for photophobia: no flashing, no high-contrast patterns.
Barometric pressure, sleep read from Apple Health, day of your cycle: Nagi tells you when your own signals start to look like what usually comes before your attacks.
After three attacks logged
“72% of your attacks follow a night shorter than 6 hours.” One sentence, one percentage, and how it compares with your usual. It describes your history — it never predicts.
Two-page PDF
Monthly frequency, intensities, medications taken and how much they helped, doses outside attacks. Ready to print over 30 days, 3 or 6 months. CSV export too.
At the end of every attack, Nagi asks one thing: did the medication work? After a handful of attacks you know which one helps, how fast, and whether you are taking it too often.
Nagi is not a medical device and does not replace medical advice.
How it works
How often attacks come, your usual symptoms, your current medications, the triggers you suspect. Nagi prefills your lists: by your first entry, the app is already set up for you.
From the app, the iOS widget or the Lock Screen. Two fields are enough — time and intensity. The details can be filled in later, once the attack has passed.
After three attacks logged, your trends open up. The two-page PDF report is generated in one tap, ready for your appointment.
Privacy
Nagi runs with no account and no server. There is no Nagi database somewhere with your attacks in it: they are on your phone, and nowhere else.
Read the privacy policyA local SQLite database, inside the app's private space. No sync to a Nagi server, because there isn't one.
You can turn on an encrypted backup in your own iCloud. Leave it off and nothing leaves the device.
Barometric pressure comes from Open-Meteo, queried with a rounded location. No health data is sent with the request.
One button deletes everything, for good. You can export to CSV first, and start over without asking us.
For the sake of completeness: Nagi measures app usage anonymously and in aggregate — screens opened, taps on key actions — and never the content of an attack, a medication or a note. You can turn this off in Settings › My data. Advertising attribution only starts if you explicitly allow it.
The mascot
Nagi is 凪 in Japanese: the lull, the flat calm after a storm. It is also a little cloud that never congratulates you for not being in pain and never asks you to do better. It notices, it keeps you company, and it brightens up when things get easier.
Calm
A day with no attack, steady pressure
Watchful
Pressure drop, short night
In an attack
Motionless, minimal contrast
Relieved
The attack has just ended
Attentive
Your trends are on their way
Welcoming
Welcome, empty screens
No flashing, no fast animation, no high-contrast patterns: the documented visual triggers are kept out of the interface, and attack mode stays strictly motionless.
Who it's for
Whether your neurologist asked you for a headache diary, you are trying to work out what sets off your own attacks, or you simply want to stop writing it all down in your phone's notes app.
A few attacks a month. The diary is mostly there to spot what keeps coming up beforehand, and to tell whether a change of habit helps.
More than fifteen headache days a month. The attack diary and the record of doses are asked for at every appointment.
Cycle tracking built in: Nagi lines your attacks up with your cycle days so you don't have to do the counting.
Pricing
The subscription unlocks what needs history behind it: your correlations, the days to watch and the report for your doctor.
Nagi
Free
No account, no time limit
€4.99 / month
€59.90 billed once a year · also available at €35.99 every 3 months
Renews automatically, cancel any time in your Apple account settings. Prices are shown in euros; the App Store charges you in your own currency.
Frequently asked questions
No, and that is not its job. Nagi is a personal logbook: it records what you enter and describes your history. It makes no diagnosis, predicts nothing, and is not a medical device. The PDF report is there to feed the conversation with your doctor, not to replace it.
No. Your attacks are saved in a local database, inside the app's private space on your phone. There is no Nagi account, so there is no server-side database. Only the weather is requested from an outside service, with a rounded location and no health data at all.
No. If you have one, Nagi reads your sleep and heart rate variability through Apple Health, with your explicit permission. Without a Watch, the iPhone's own data is enough, and if you decline access to Apple Health, everything works with manual entry.
Nagi fetches the day's pressure and its 24-hour change for your area, then lines it up with the attacks you have already logged. When your own signals look like what usually comes before an attack, the day is flagged as one to watch. It is a reading of your history, not a forecast.
Yes. You can add an attack from yesterday or last week from the diary, and fill in the details of an already saved attack at any time. That is how it is meant to work: log fast, complete afterwards.
Two A4 pages: monthly frequency, intensities, average duration, the detail of each attack, medications taken with the relief you recorded, and doses outside attacks. Over 30 days, 3 months or 6 months, as a print-ready PDF or as CSV.
Yes, after iOS. The app has been built cross-platform from day one, and the Android version will follow the App Store release.
From your Apple account settings, at any time and in two taps. The seven-day trial ends without being charged if you cancel before it is over. Nagi has no way of holding on to you: we do not handle the payments.
Download Nagi, answer six questions, and your diary is ready. Free, no account, and your data stays with you.
Coming soon to
Google Play
