# Fibromyalgia vs Marin

The clearest difference is in-app purchases: Marin at none against Fibromyalgia's 7. Marin also leads on iOS requirement (13.0 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Fibromyalgia sells 7 in-app purchases, starting at $4.99 per month. Marin asks for nothing beyond the download.

Fibromyalgia ships an update every 4 months, Marin every 3 months. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Fibromyalgia | Marin |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Free with in-app purchases | — |
| Size | 302 MB | 90 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [CogniFit](https://appshunter.io/developer/528285613) | [Medical Life](https://appshunter.io/developer/1764410925) |

## What reviewers say

### Fibromyalgia

[App page](https://appshunter.io/ios/app/fibromyalgia-research/id1412026404)

This app facilitates participation in scientific studies focused on the cognitive symptoms of Fibromyalgia. It employs advanced digital tools for cognitive evaluation and research into areas like attention, memory, and processing speed. Designed for researchers and individuals interested in contributing to Fibromyalgia studies.

**Highlights:** Participate in scientific studies, Investigate cognitive symptoms, Evaluate attention and memory, Track processing speed, Digital tools for research, Contribute to scientific community

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription 75% Off | $4.99 | per month |
| Monthly Subscription 50% Off | $9.99 | per month |
| Monthly Subscription | $19.99 | per month |
| Yearly Subscription 75% Off | $22.99 | per year |
| Yearly Subscription 50% Off | $44.99 | per year |
| Yearly Subscription | $89.99 | per year |
| Assessment - Full price | $49.99 | one-time |


### Marin

[App page](https://appshunter.io/ios/app/marin/id6738710219)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fibromyalgia free?

Fibromyalgia is free to download, with in-app purchases available.

### Is Marin free?

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

### Do Fibromyalgia or Marin have ads?

Neither Fibromyalgia nor Marin shows ads.

### Which is updated more often, Fibromyalgia or Marin?

Fibromyalgia ships an update every 4 months, and Marin every 3 months. Most recently, Fibromyalgia was updated on November 2, 2026 and Marin on October 30, 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.*