CalmGrid

CalmGrid helps people with migraine see attacks coming and understand what sets them off.

Migraine forecast: every day CalmGrid estimates your migraine risk from 0 to 100 and puts it in one of four risk bands. Weather signals include low and falling barometric pressure, large 24-hour temperature changes, high humidity, PM2.5 and pollen. Personal signals come from Apple Health: sleep debt, HRV drops compared to your own baseline, and menstrual cycle phase, along with recent attacks and your weekday patterns. Each forecast lists the signals that raised your risk, so the number is never a black box. You can get a notification when today or tomorrow looks high risk.

Fast logging: a guided wizard records an attack in under a minute, even mid-attack. Log severity, pain location, symptoms, triggers, medications with dose and effectiveness, relief methods and the impact on work, sleep and social life. Every step can be skipped, and every list can be customized.

Insights and reports: see attack frequency, severity, duration and weekday patterns. Pro adds ranked triggers and symptoms, medication effectiveness, time-of-day analysis and a PDF report to bring to your neurologist.

Private by design: no account is needed and your health entries are stored on your device, never in the cloud. Anonymous usage statistics and crash reports can be turned off in Settings.

Built for people in pain: dark mode, a calm low-contrast interface and haptic feedback. Available in 32 languages.

Free covers logging, the calendar, basic insights and the forecast risk band with its top reason. Pro unlocks the full forecast score and breakdown, advanced analytics and PDF export.