# Megrim: Migraine Diary — Private, offline, open source

> Private, offline, open source (iPhone/iPad app by Stephen Maegley.)

- Source: https://appshunter.io/ios/app/megrim-migraine-diary/id6808385548 (this page in markdown: same URL + `.md`)
- Developer: [Stephen Maegley](https://appshunter.io/developer/6808385550)
- Category: Health & Fitness, Medical
- Price: Free
- Age rating: 12+
- Requires: iOS 16.0 · 30 MB
- Languages: American English
- Released: 2026-09-08
- Data updated: 2026-10-08

## What is Megrim?

Smart migraine tracking that stays on your device.

Megrim is an open-source, offline-first migraine diary that helps you find your personal triggers. The app automatically adds time-of-day, season, daylight, and moon context to your entries — and, if you opt in, local weather and barometric pressure — calculating correlations entirely on your device. With no accounts, no cloud servers, and zero tracking, your health data stays completely private and under your control.

What's inside:

• Automatic on-device enrichment — daylight hours, time of day, season, and moon phase computed locally; opt in to add local weather and barometric-pressure change (24h/48h). No manual entry.
• Real personal analytics — trends by day-of-week, time-of-day, season, daylight, pressure change, and moon phase, plus a "suspected factors" card that uses odds ratios over your own log.
• Your data stays yours — on-device storage only, with full export and import (JSON and CSV).
• No accounts, no servers, no telemetry — by default the app makes no automatic network requests (the only exception is the place-name search you type when setting your home location). Weather enrichment is opt-in; when enabled, the only network request is to Open-Meteo.com, to fetch weather for the approximate (~1 km rounded) location and date of the entries you create.
• Free and open source (GPL-3.0-or-later).

Megrim is a personal diary and is NOT a medical device. It does not diagnose, treat, cure, or prevent any condition. "Suspected factors" are statistical associations in your own log — association is not causation. Always consult a qualified healthcare professional.

Weather data by Open-Meteo.com.

## Is Megrim safe?

Not enough ratings yet to assess Megrim.

## Is Megrim legit?

Megrim: Migraine Diary has limited verification signals. The AppsHunter Legitimacy Score for Megrim is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.0.6 — 2026-10-06

• New: Export report (PDF) — a printable summary of your diary to hand to a clinician, built on your device and never uploaded.
• New: an optional backup reminder. Settings shows when you last exported, and can warn you after 7, 14, 30 or 90 days.
• Once the reminder is on, the Log screen shows a small green or orange backup indicator.

### 1.0.5 — 2026-09-30

• The Recorded location picker now offers your last 3 locations, so logging an entry away from home is one tap (thanks @zatteo).
• New on Analytics: "Away from home" — how many entries you recorded more than 100 km from your home location, and where.
• "Travel" is now one of the default suspected triggers.

### 1.0.4 — 2026-09-23

• Fixed: entries no longer shift to another day or hour when you travel across time zones — each entry remembers the zone it was logged in.
• Editing a start time now moves the end time with it, so a backdated entry needs one date pick, not two (thanks @zatteo).
• JSON exports include the app's computed analytics, so reports built from an export match the Analytics tab.
• New: an offline report page that turns an export into a printable summary or PDF. (thanks @nfd9001).

### 1.0.3 — 2026-09-20

• Fixed: the History calendar jumped back to the top after opening an entry, and after switching List/Calendar. It now keeps your place.
• Fixed: tapping an empty calendar day (or "Add past entry") and then backing out left an empty entry behind. Nothing is saved until you tap Save.
• Fixed: returning from "Manage" (triggers, head locations, medications) no longer discards unsaved edits on an entry.

### 1.0.2 — 2026-09-08

No release notes.

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## Related topics

[migraine diary free](https://appshunter.io/ios/topics/migraine-diary-free)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-08.*