# MoodSync Tracker vs PEM Diary

The clearest difference is iOS requirement: PEM Diary at 15.1 against MoodSync Tracker's 18.2. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | MoodSync Tracker | PEM Diary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (2 ratings)](https://appshunter.io/ios/app/pem-diary-mecfs-crash-log/id6743624638/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 3 months |
| Monetization | — | Free |
| Size | 1 MB | 92 MB |
| Requires iOS | 18.2 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [CodeBlock](https://appshunter.io/developer/1456284763) | [Add Jam](https://appshunter.io/developer/1075812699) |

## What reviewers say

### MoodSync Tracker

[App page](https://appshunter.io/ios/app/moodsync-tracker/id6743411105)

**Features:** macOS Compatibility

**In-app purchases:** none


### PEM Diary

[App page](https://appshunter.io/ios/app/pem-diary-mecfs-crash-log/id6743624638)

This app helps individuals manage post-exertional malaise (PEM) by logging crashes, tracking severity, symptoms, and duration. It provides insights into patterns and creates a shareable record for personal reference or healthcare discussions.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is MoodSync Tracker free?

MoodSync Tracker is free to download, with no in-app purchases.

### Is PEM Diary free?

PEM Diary is free to download, with no in-app purchases.

### Do MoodSync Tracker or PEM Diary have ads?

Neither MoodSync Tracker nor PEM Diary shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*