Record the moment
Start an attack and add intensity, medication or notes when you feel able.
Dim · iPhone
A migraine diary for the moments you need less screen.
Record an attack, keep the details together and bring a clearer history to your next appointment. Dim is a quiet diary for iPhone.
No account. No ads. We do not sell your diary data.
Enlarge app screenshot · 4K ↗
Keep useful context
Review your calendar and recorded details alongside available sleep and weather data.
Prepare for your appointment
Read through your history or use Pro to export a PDF report or CSV.
Not sure where to start?
Free migraine diary templates
One simple diary for the essentials. Fill it in online, or download a blank one-page PDF to print.
Blank A4 sheet · no account · print as many copies as you need
All templates →
Dim
Included for free
Attack logging, calendar, history, Apple Watch logging and widgets.
Dim Pro
Optional Dim Pro
PDF reports, CSV export and pattern insights. Monthly or annual subscription; the App Store shows the local price and any eligible trial before purchase.
Apple Health
With permission, Dim reads headache and sleep data from Apple Health and writes headache entries. Notes, medication and every detail from other apps are not automatically imported.
Weather and sleep can add context when permissions and data are available. A repeated pattern is not proof of a trigger.
Questions
Everything people ask about Dim.
How fast can I log a migraine attack?
Start an attack and add intensity, medication or notes when you feel able.
Does Dim track barometric pressure and weather?
Weather and sleep can add context when permissions and data are available. A repeated pattern is not proof of a trigger.
Can I export a report for my doctor?
PDF reports, CSV export and pattern insights. Monthly or annual subscription; the App Store shows the local price and any eligible trial before purchase.
Does Dim sync with Apple Health?
With permission, Dim reads headache and sleep data from Apple Health and writes headache entries. Notes, medication and every detail from other apps are not automatically imported.
Do I need an account? Is my data private?
No account. No ads. We do not sell your diary data.
Is Dim free?
Attack logging, calendar, history, Apple Watch logging and widgets. PDF reports, CSV export and pattern insights. Monthly or annual subscription; the App Store shows the local price and any eligible trial before purchase.
Is Dim a medical device?
No. Dim is a personal diary — it does not diagnose, treat, or prevent any condition. It helps you and your doctor see the full picture. Always consult a qualified clinician about your health.