# Fibromyalgia vs SIFIS

The clearest difference is in-app purchases: SIFIS at none against Fibromyalgia's 7. SIFIS also leads on update cadence (weekly vs every 4 months) and iOS requirement (11.0 vs 16.0). On price, 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. SIFIS asks for nothing beyond the download.

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

## The numbers

| Metric | Fibromyalgia | SIFIS |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 302 MB | 36 MB |
| Requires iOS | 16.0 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [CogniFit](https://appshunter.io/developer/528285613) | [HIPPOCRATES SINTECH S.R.L.](https://appshunter.io/developer/537938391) |

## 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 |


### SIFIS

[App page](https://appshunter.io/ios/app/sifis/id1477173387)

**In-app purchases:** none


## Frequently asked questions

### Is Fibromyalgia free?

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

### Is SIFIS free?

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

### Do Fibromyalgia or SIFIS have ads?

Neither Fibromyalgia nor SIFIS shows ads.

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

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