# R vs Union Catalog

R and Union Catalog are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | R | Union Catalog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Size | 449 MB | 25 MB |
| Requires iOS | 14.5 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Luis Acevedo-Arreguin](https://appshunter.io/developer/1642773653) | [Kaung Htet Aung](https://appshunter.io/developer/1884302917) |

## What reviewers say

### R

[App page](https://appshunter.io/ios/app/r-statscalc/id1642773651)

**Features:** macOS Compatibility

**In-app purchases:** none


### Union Catalog

[App page](https://appshunter.io/ios/app/union-catalog/id6761687038)

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

**In-app purchases:** none


## Frequently asked questions

### Is R free?

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

### Is Union Catalog free?

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

### Do R or Union Catalog have ads?

Neither R nor Union Catalog shows ads.

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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.*