# PEM Diary - ME/CFS Crash Log — Track post-exertional malaise

> Log and track post-exertional malaise (PEM) for ME/CFS and fatigue management. (iPhone/iPad app by Add Jam.)

- Source: https://appshunter.io/ios/app/pem-diary-mecfs-crash-log/id6743624638 (this page in markdown: same URL + `.md`)
- Developer: [Add Jam](https://appshunter.io/developer/1075812699)
- Category: Health & Fitness, Medical
- Price: Free
- Age rating: 17+
- Requires: iOS 15.1 · 92 MB
- Languages: American English
- Released: 2025-04-04
- Data updated: 2026-06-02
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/pem-diary-mecfs-crash-log/id6743624638/reviews.md

## What is PEM Diary?

Do you experience episodes of extreme fatigue? PEM Diary helps you log and track post-exertional malaise (PEM) with personal records, including severity, symptoms, and duration. Whether you’re managing ME/CFS (Myalgic Encephalomyelitis/Chronic Fatigue Syndrome) or dealing with unexplained fatigue, this app helps you identify patterns and keep a record for personal reference or discussions with your healthcare provider.

FEATURES:
- Log PEM crashes with start & end dates
- Track severity (1–5 scale) & symptoms
- Add notes for additional context
- View trends with a timeline & dashboard
- 100% private – all data is stored locally on your device and never leaves it unless you export it
- Data export - export your collected data as a CSV which is easily shareable with health care professionals or studies

Use PEM Diary to track PEM for personal insights or to support medical discussions and diagnosis efforts. Start managing your health more effectively today!

PRIVACY & SECURITY
Your health data never leaves your device unless you choose to export it. No cloud storage, no data sharing – complete privacy guaranteed.

MADE FOR YOU
Perfect for:
• Tracking PEM patterns
• Supporting healthcare discussions
• Understanding your energy limits
• Building a detailed health record

MEDICAL NOTICE
PEM Diary is a personal tracking tool. Always consult healthcare professionals for medical advice and treatment decisions.
Download now to take control of your energy management journey!

Start tracking your PEM episodes!

## Key features

- Log PEM crashes with dates
- Track severity and symptoms
- Add contextual notes
- View trends on timeline/dashboard
- 100% private local storage
- Export data as CSV

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/pem-diary-mecfs-crash-log/id6743624638/reviews.md

### 3/5 — Private data or not  private?

*2026-03-20*

Loved the concept but won’t keep it due to conflicting statements about privacy. Also, content in the app is accessed from a link to static data (not even text but rather an image of the text on a paper

### 5/5 — Love this app

*2026-02-27*

Simple and so informative! I don’t know how i survived without this app

## Frequently asked questions about PEM Diary

### What is PEM Diary used for?

PEM Diary is a personal tracking tool designed to help users log and monitor episodes of post-exertional malaise (PEM), including their severity, symptoms, and duration. It aims to identify patterns and provide a detailed record for personal insights or discussions with healthcare providers.

### How does PEM Diary protect my privacy?

PEM Diary prioritizes user privacy by storing all logged data exclusively on the user's device. No data is uploaded to the cloud or shared with third parties unless the user explicitly chooses to export it, ensuring complete data confidentiality.

### Can I share my data with my doctor using PEM Diary?

Yes, PEM Diary allows you to export your collected data in a CSV format. This makes it easy to share your detailed PEM logs and patterns with healthcare professionals to support discussions about your condition and diagnosis.

### What is the age rating for PEM Diary?

PEM Diary has an age rating of 17+, indicating it is intended for mature users. This is likely due to the sensitive nature of the health data being tracked.

### How often is PEM Diary updated?

The latest version of PEM Diary is 1.1.1, and it was last updated on October 8, 2025. This indicates a recent update, suggesting ongoing development and support for the application.

### What devices does PEM Diary support?

PEM Diary is available for iPhone and iPod devices. It is designed to run on Apple's mobile operating system.

### Does PEM Diary have ads?

No, PEM Diary is ad-free. The application does not contain advertisements, providing an uninterrupted user experience for tracking health data.

### Is PEM Diary free to use?

Yes, PEM Diary is available for free. There are no costs associated with downloading or using the core features of the application.

## Version history (last 3 releases)

### 1.1.1 — 2025-10-08

Under‑the‑bonnet updates to keep PEM tracking reliable and running smoothly

### 1.1.0 — 2025-08-08

Thanks for all the feedback and support. This update adds support for dark mode and improves internationalisation of the app content.

### 1.0 — 2025-04-04

No release notes.

## Apps similar to PEM Diary

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Chronic Fatigue Diary 3](https://appshunter.io/ios/app/chronic-fatigue-diary-3/id6463496523) | — | $4.99 | Health & Fitness |
| [POTS Tracker - Tachycardia](https://appshunter.io/ios/app/pots-tracker-tachycardia/id6743040831) | 2.8 (4) | Free | Health & Fitness |
| [CFS Tracker](https://appshunter.io/ios/app/cfs-tracker/id6743564981) | — | Free | Health & Fitness |
| [Here and Now - The App](https://appshunter.io/ios/app/here-and-now-the-app/id6466618826) | — | Free | Health & Fitness |
| [Meo Health](https://appshunter.io/ios/app/meo-health/id6468690625) | 5.0 (21) | Free | Health & Fitness |
| [Clove: Chronic Illness Tracker](https://appshunter.io/ios/app/clove-chronic-illness-tracker/id6748584263) | 5.0 (17) | Free | Health & Fitness |

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All apps by Add Jam: https://appshunter.io/developer/1075812699

## Related topics

[pem](https://appshunter.io/ios/topics/pem) · [chronic fatigue diary 3](https://appshunter.io/ios/topics/chronic-fatigue-diary-3)

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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 2026-06-02.*