# CathDoc vs Prolocums

The clearest difference is update cadence: Prolocums at every 3 days against CathDoc's every 3 weeks. 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.

CathDoc ships an update every 3 weeks, Prolocums every 3 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | CathDoc | Prolocums |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Size | 12 MB | 27 MB |
| Requires iOS | 15.6 | **14.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Lumen Innovations, LLC](https://appshunter.io/developer/1489598636) | [Prolocums LLC](https://appshunter.io/developer/1896542129) |

## What reviewers say

### CathDoc

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Prolocums

[App page](https://appshunter.io/ios/app/prolocums/id6768124902)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is CathDoc free?

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

### Is Prolocums free?

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

### Do CathDoc or Prolocums have ads?

Neither CathDoc nor Prolocums shows ads.

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

CathDoc ships an update every 3 weeks, and Prolocums every 3 days. Most recently, CathDoc was updated on October 25, 2026 and Prolocums on October 25, 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.*