Halo: Migraine Tracker

iPhone app by Kamal Nasir

Migraine tracker and headache diary for iPhone: Halo logs attacks in seconds, then checks which factors, such as weather and sleep, line up with them.

What it does

• Attack Mode: a dim, silent screen with no animations that logs onset, pain and medication in under ten seconds and works offline, with a Live Activity until the attack ends
• Log from the Lock Screen, an Apple Watch or a widget, including symptoms such as vertigo, dizziness, motion sensitivity and brain fog
• Comfort tools for after you log, offered as comfort and not treatment: a dim green screen, paced breathing at about six breaths a minute, and a masking sound that keeps playing with the phone locked
• Each attack is stamped automatically with the barometric pressure, temperature and humidity of the 24 hours before it, from Apple Weather, with a 48-hour forecast built from your own significant factors
• Trigger statistics using Fisher's exact test with multiple-comparison correction, sorted into a Trigger Map that also shows what was ruled out and where there is not enough data yet, with up to five factors of your own
• A follow-up two hours after a dose asks whether it helped, and a medication-overuse count tracks intake days
• A PDF for your neurologist with your attack calendar, frequency trends, medication response, trigger map, MIDAS score and notes, plus a reminder three days before a saved appointment

Halo is a personal tracking log, not a medical device. It does not diagnose, treat or predict illness, and its reports are meant to be taken to a clinician you trust.

Questions people ask

What should I record in a migraine diary?

Common entries are when an attack started and ended, how bad the pain was, what medication you took and whether it helped, and what came before it, such as sleep, weather or your cycle. Halo records onset, pain and medication during the attack, asks two hours after a dose whether it helped, and stamps each attack with the weather from the 24 hours before it.

Can a migraine app track barometric pressure?

Halo does it automatically: every attack is stamped with the barometric pressure, temperature and humidity of the 24 hours before it, from Apple Weather. It then tests those readings against your own history, says "associated with" rather than "caused by", and tells you when there is not enough data yet.

Can I share my migraine history with my doctor?

Yes. Halo builds a PDF with your attack calendar, frequency trends, medication response, trigger map including what was ruled out, your MIDAS score and your notes. The doctor PDF is part of Halo Pro, and CSV export of your data is also available.

Comparing apps? See the guide: Best migraine tracking apps for iPhone in 2026.

More apps by Kamal Nasir

• Kamera Pro: LiDAR Night Vision
• Nocturne: Card Value Scanner
• HydroNest Family Water Tracker
• IBS Tracker Food Diary: Fennel
• Litmus Label Reader
• Halal Scanner - Dalil
• ChartKey: Medical Keyboard
• Therapy Notes Keyboard NoteKey
• BPM, Key and Loudness: Quint
• Drone Weather Hourly: Pitot
• Jolt: Tic Tac Toe

Published by Kamal Nasir, the developer of the apps marked Ours. Apps change, so check each one's App Store page for its latest features.