# Raynaud vs EPIO Research

The clearest difference is update cadence: EPIO Research at every 2 months against Raynaud's every 5 months. EPIO Research also leads on iOS requirement (14.0 vs 16.4). 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.

Raynaud ships an update every 5 months, EPIO Research every 2 months. The most recent releases landed on October 21, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Raynaud | EPIO Research |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/raynaud/id1445478142/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 24 MB | 31 MB |
| Requires iOS | 16.4 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Bambang Parmanto](https://appshunter.io/developer/1227792027) | [Oslo Universitetssykehus HF](https://appshunter.io/developer/1019156091) |

## What reviewers say

### Raynaud

[App page](https://appshunter.io/ios/app/raynaud/id1445478142)

This app allows individuals experiencing Raynaud's symptoms to meticulously log their attacks. Users can document episodes as they happen or recall past events. It also offers a daily diary feature and customizable reminders for notifications.

**Highlights:** Real-time attack logging, Retrospective attack reporting, Daily RCS diary completion, Customizable notification reminders, Attack tracking for Raynaud's symptoms

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

**In-app purchases:** none


### EPIO Research

[App page](https://appshunter.io/ios/app/epio-research/id1446883754)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Raynaud free?

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

### Is EPIO Research free?

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

### Do Raynaud or EPIO Research have ads?

Neither Raynaud nor EPIO Research shows ads.

### Which is updated more often, Raynaud or EPIO Research?

Raynaud ships an update every 5 months, and EPIO Research every 2 months. Most recently, Raynaud was updated on October 21, 2026 and EPIO Research on October 5, 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.*