# PEM Diary vs VIRTUS.

The clearest difference is rating: VIRTUS. at 5.0 against PEM Diary's 4.0. On price, ratings volume, update cadence and ads there is nothing between them.

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

VIRTUS. holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 3 respectively.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 17, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | PEM Diary | VIRTUS. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/pem-diary-mecfs-crash-log/id6743624638/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/virtus/id6761403339/reviews)** |
| Number of ratings | 2 | **3** |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free | Free |
| Size | 92 MB | 73 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Add Jam](https://appshunter.io/developer/1075812699) | [THOMAS FRANCIS LUSSIER](https://appshunter.io/developer/1889406661) |

## What reviewers say

### 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


### VIRTUS.

[App page](https://appshunter.io/ios/app/virtus/id6761403339)

This app provides detailed data on your workouts, showing your progress with real-time updates on estimated 1RM, training intensity, and muscle engagement. It helps you train smarter by visualizing your strength and volume.

**Highlights:** Real-time estimated 1RM updates, Track training intensity, Strength Triangle visualization, Volume Circle for muscle engagement, Detailed workout data breakdown

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

**In-app purchases:** none


## Frequently asked questions

### Is PEM Diary free?

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

### Is VIRTUS. free?

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

### Which has better reviews, PEM Diary or VIRTUS.?

VIRTUS. is rated higher. PEM Diary averages 4.0 out of 5 from 2 ratings, while VIRTUS. averages 5.0 from 3 ratings.

### Do PEM Diary or VIRTUS. have ads?

Neither PEM Diary nor VIRTUS. shows ads.

### Which is updated more often, PEM Diary or VIRTUS.?

PEM Diary ships an update every 3 months, and VIRTUS. every 3 months. Most recently, PEM Diary was updated on October 17, 2026 and VIRTUS. on October 8, 2026.

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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.*