Migraine. Logged honestly.
Most apps treat a migraine like a one-row event: pain level, painkiller, done. Migraine doesn't actually work that way. Leo follows attacks through their four phases — prodrome, aura, headache, postdrome — and then shows you which factors in your own logged data tend to line up with the attacks you've had.
Migraine has four phases.
Treating a migraine as a one-row pain event is what most apps do, and it's why most logs feel useless after a month. The headache is the most visible phase, but it's not the only one — and the other three carry signal a clinician would want to see.
Prodrome
The warning phase. Many people learn to recognize a handful of signals — a craving, a stiff neck, yawning, mood shift, a foggy half-day — that show up before the headache does.
Aura
Sensory or neurological symptoms that happen for about a third of people. Most often visual (zig-zag lines, blind spots), but also sensory (tingling), speech, motor, brainstem, or retinal.
Headache
The pain itself, typically one-sided, often throbbing, usually worse with movement, frequently with light, sound, or smell sensitivity and nausea.
Postdrome
The recovery phase, sometimes called the migraine hangover — brain fog, fatigue, residual sensitivity, mood changes. About 80% of people experience some form of it.
What an attack looks like inside Leo.
You can log it three ways: Happening Now opens an active timer that lets you tick through phases as they actually happen; Log Past Attack is for backfilling a single attack from memory; Detailed Log is the guided form. Whichever route, the same set of fields is captured.
As you move through phases, Leo can suggest the next one based on time elapsed and the symptoms you've recorded — for example, suggesting headache when prodrome symptoms have been logged and your personal prodrome length has typically been four hours. You can accept the suggestion or ignore it.
A daily card of factors that co-occur with your attacks.
Once you've logged five or so attacks, the hub shows a Today's Outlook card. It surfaces three things at once: today's weather (with a flag for rapid barometric drops), today's menstrual-cycle phase if you track that, and the top factors from your own history that line up with today.
It's described in plain English — “pressure dropping, sleep below your usual, Thursday” — and labeled low / moderate / elevated. It's a reflection of your data, not a forecast, not a recommendation, and not a medical claim. The math is documented at /engines and runs entirely on your device.
Captured locally. Barometric pressure, temperature, humidity. Rapid pressure changes flagged.
If you track a cycle, current phase is read from the Cycle hub — not duplicated.
Top factors from your own data — day of week, time of day, sleep below your usual, triggers you've logged before.
Monthly summary, severity trend, and a four-tab insights drawer.
Open the hub and the top of the screen shows the month at a glance — a ring of migraine-free days, a count of attacks, average severity, average duration, days since the last one. Below that, a severity trend chart you can flip between 30 and 90 days, with the “severe” threshold marked.
Then four tabs of insights, computed from your own data:
Top triggers by frequency. Bar chart of how often each tag appears across your attacks. Custom tags count too.
Rescue meds you've taken, ranked by average effectiveness rating and average time-to-relief. Sorted with the most reliable on top.
Day-of-week and time-of-day breakdowns. Plain-English lines like "2.1× more attacks on Mondays" when the pattern is strong enough to mention.
MIDAS-5, the standard Migraine Disability Assessment questionnaire, with Grade I–IV interpretation. Retake any time and watch your score trend.
The list of things we'd like to ship, and haven't yet.
Most condition pages on the internet read like a brochure. This one tells you where the migraine surface stops today. The list below is the active backlog for this hub — every item is on the feature-parity tracker, and the page gets updated as items ship.
A general-purpose Leo health report exists; a migraine-specific report card isn't shipped yet.
Weather is captured at the time you log an attack and surfaced in Today's Outlook. Push alerts based on pressure forecasts aren't wired up.
We log how often rescue meds are taken but don't yet flag frequency-based rebound-headache risk.
Preventive injection cadence isn't yet built into the migraine hub. Track injection dates in the general medications list for now.
Food triggers can be entered as custom tags but there's no structured food log yet.
Dehydration is selectable as a trigger; daily fluid logging isn't a feature.
Screen time is a selectable trigger; Leo doesn't yet pull from iOS Screen Time.
Glucose can flow in via HealthKit if your CGM writes there, but Leo has no Dexcom-direct integration.
Track an attack the way it actually unfolds.
Phase-aware logging, descriptive co-occurrence, on-device math, and a backlog we name out loud. Built for adults and kids with migraine, and the parents and partners who help them through it.