---
title: "PEM Diary - ME/CFS Crash Log - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "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 managin"
---

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

![PEM Diary App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/17/82/98/17829892-1a5b-ed2f-4026-7dc54a6d0b16/AppIcon-0-0-1x_U007emarketing-0-6-0-85-220.png/400x400bb.png)

**Developer:** [ADD JAM](https://apptail.io/developer/add-jam-CIjc)
**Category:** Health Fitness
**Rating:** 4.0/5 (2 ratings)
**Price:** Free
**Bundle ID:** com.addjam.pemtracker
**Store:** Apple App Store
**Country:** United States
**Version:** 1.1.1 (released 2025-10-08)
**Original Release:** 2025-04-04

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6743624638)
**AppTail Page:** [https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/united-states](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/united-states)

## PEM Diary Description
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!

## PEM Diary Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/39/f7/31/39f73148-b11d-63ca-6906-2e703875d380/iPhone_16_Pro_Max_-_16.png/1320x2868.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/74/af/47/74af478d-397c-a40d-d3eb-fdfad4f1f501/iPhone_16_Pro_Max_-_17.png/1320x2868.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/05/b8/01/05b8016e-5332-a2e6-6667-78315247dd8b/iPhone_16_Pro_Max_-_19.png/1320x2868.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/06/4f/ab/064fabb3-0ffc-528d-c1c3-ebb64d840065/iPhone_16_Pro_Max_-_20.png/1320x2868.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/9c/48/da/9c48dab2-1d5c-bc4f-ae07-192ca7d67587/iPhone_16_Pro_Max_-_21.png/1320x2868.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/ab/15/c9/ab15c93f-2b47-2e10-17a5-6386aa7e8fd4/iPhone_16_Pro_Max_-_30.png/1320x2868.png)
- [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/9d/46/73/9d46738a-9c4e-de29-b79d-52218c74ee67/iPhone_16_Pro_Max_-_22.png/1320x2868.png)
- [Screenshot 8](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/d2/7f/85/d27f85c4-2cc5-93b2-15e4-4e9830fde240/iPhone_16_Pro_Max_-_29.png/1320x2868.png)
- [Screenshot 9](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/43/af/00/43af001d-62eb-9c24-683a-1aa4236110bb/iPhone_16_Pro_Max_-_23.png/1320x2868.png)
- [Screenshot 10](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/08/97/91/08979152-5862-8434-3735-e8e7c8bde000/iPhone_16_Pro_Max_-_18.png/1320x2868.png)

## PEM Diary Rating Breakdown in United States
- 5 stars: 1 (50%)
- 4 stars: 0 (0%)
- 3 stars: 1 (50%)
- 2 stars: 0 (0%)
- 1 stars: 0 (0%)





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## PEM Diary Available In
- [United States](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/united-states)
- [United Kingdom](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/united-kingdom)
- [France](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/france)
- [Ireland](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/ireland)
- [Netherlands](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/netherlands)
- [Bahrain](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/bahrain)
- [Brazil](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/brazil)
- [Belarus](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/belarus)
- [Canada](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/canada)
- [Switzerland](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/switzerland)
- [Chile](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/chile)
- [China](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/china)
- [Czechia](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/czechia)
- [Germany](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/germany)
- [Denmark](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/denmark)
- [Dominican Republic](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/dominican-republic)
- [Egypt](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/egypt)
- [Spain](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/spain)
- [Hungary](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/hungary)
- [Israel](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/israel)
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- [North Macedonia](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/north-macedonia)
- [Malta](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/malta)
- [Mexico](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/mexico)
- [Nigeria](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/nigeria)
- [Norway](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/norway)
- [New Zealand](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/new-zealand)
- [Peru](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/peru)
- [Portugal](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/portugal)
- [Romania](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/romania)
- [Russia](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/russia)
- [Saudi Arabia](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/saudi-arabia)
- [Sweden](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/sweden)
- [Singapore](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/singapore)
- [Slovenia](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/slovenia)
- [Slovakia](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/slovakia)
- [Thailand](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/thailand)
- [Türkiye](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/turkey)
- [Ukraine](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/ukraine)
- [Uzbekistan](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/uzbekistan)
- [Vietnam](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/vietnam)
- [United Arab Emirates](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/united-arab-emirates)
- [South Africa](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/south-africa)
- [Austria](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/austria)
- [Australia](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/australia)
- [Azerbaijan](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/azerbaijan)
- [Belgium](https://apptail.io/app/pem-diary-mecfs-crash-log-DJjv/belgium)

---

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