# IR4U vs CathDoc

The clearest difference is device support: CathDoc at 3 against IR4U's 1. CathDoc also leads on iOS requirement (15.6 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 13, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | IR4U | CathDoc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ir4u/id6739450492/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free | — |
| Size | 36 MB | 12 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [IR4U](https://appshunter.io/developer/1785378410) | [Lumen Innovations, LLC](https://appshunter.io/developer/1489598636) |

## What reviewers say

### IR4U

[App page](https://appshunter.io/ios/app/ir4u/id6739450492)

This platform offers educational resources and interactive features for learning about interventional radiology. It provides case studies, courses, presentations, and study materials, connecting users with experts in the field.

**Highlights:** Field Level Case Studies, Interactive Expert Chat, IR Courses, Presentations, Study Material, Expert Reviews

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

**In-app purchases:** none


### CathDoc

[App page](https://appshunter.io/ios/app/cathdoc/id6757081293)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IR4U free?

IR4U is free to download, with no in-app purchases.

### Is CathDoc free?

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

### Do IR4U or CathDoc have ads?

Neither IR4U nor CathDoc shows ads.

### Which is updated more often, IR4U or CathDoc?

IR4U ships an update every 3 weeks, and CathDoc every 3 weeks. Most recently, IR4U was updated on September 13, 2026 and CathDoc on September 18, 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.*