DimLog: Migraine Tracker

Log a headache with a single tap — even when light hurts. A pure black, low-glare design built for migraine days.

DimLog is a headache and migraine diary designed for the moments when looking at a screen is hard.

ONE TAP, EVEN IN PAIN Tap Mild, Moderate or Severe and you're done. The buttons sit at the bottom of the screen, within reach of your thumb. Made a mistake? Tap Undo. Pain got worse? Tap again and the record is updated — never duplicated.

BUILT FOR LIGHT SENSITIVITY A true black background, dimmed gray text and muted colors keep the light your screen gives off to a minimum. No flashy animations, no ads.

LOG FROM YOUR HOME SCREEN Add the DimLog widget and log a headache without opening the app. The button you tapped stays checked, so you know it was recorded.

SEE YOUR MONTH AT A GLANCE The calendar shades each day by its strongest headache and marks days you took medication.

WEATHER AND AIR PRESSURE Turn on weather and DimLog looks up the weather where each headache was logged, using your approximate location. Each record shows the conditions, temperature, humidity and air pressure, and how the pressure changed in the 24 and 6 hours before and the 6 hours after the headache started.

INSIGHTS FROM YOUR OWN RECORDS Over the past 30 days, 90 days or year, see how often headaches happened on days when the pressure fell or rose compared with the day before or into the next day, on days with a big temperature change, on humid days and on rainy days. With your permission, DimLog also reads sleep and menstrual cycle records from the Health app to compare headache days by hours of sleep and around the start of a period.

MEDICATION DAYS AND TRIGGERS See how many days each month you took medication, and add possible triggers — like lack of sleep, stress or alcohol — to a record.

REPORTS FOR YOUR DOCTOR See a one-page A4 headache report for any month, or for the four weeks up to a day you choose: headache days and episodes, medication days, intensity and impact on daily life, and a calendar showing the intensity for each time of day and when you took medication. A weather report shows the pressure over the month with your headaches marked, headache days by weather, and a row of weather data for every day — or a one-page summary of three months.

ADD DETAILS LATER, WITHOUT THE TYPING

• Time of day: Early morning, Morning, Afternoon, Evening or Late night — no need to remember the exact time
• Impact on daily life: Minor, Half capacity or Bed rest
• Medications and triggers picked from your own history
• Free-form notes

PRIVATE BY DESIGN Your records stay on your iPhone. DimLog has no account and uses no analytics or tracking. When weather is on, only your approximate location is sent to Apple Weather to look up the weather. Health data is read on your iPhone and never leaves it.

DimLog is free to download and use. Viewing reports in the app is free. Saving, printing and sharing reports as PDFs, zooming in, and the weather, sleep and cycle insights are an optional one-time purchase — no subscription.

DimLog is a personal logging tool and is not intended to diagnose, treat, or prevent any medical condition. Always consult a healthcare professional about your symptoms.