# CRSA vs Doc Chap Pro

The clearest difference is update cadence: CRSA at every 6 weeks against Doc Chap Pro's every 3 months. CRSA also leads on iOS requirement (12.0 vs 15.5). 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.

CRSA ships an update every 6 weeks, Doc Chap Pro every 3 months. The most recent releases landed on September 18, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | CRSA | Doc Chap Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Size | 17 MB | 214 MB |
| Requires iOS | **12.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [2LA](https://appshunter.io/developer/914812601) | [MERCURY GLOBAL](https://appshunter.io/developer/1811029725) |

## What reviewers say

### CRSA

[App page](https://appshunter.io/ios/app/crsa/id1462428136)

**Features:** macOS Compatibility

**In-app purchases:** none


### Doc Chap Pro

[App page](https://appshunter.io/ios/app/doc-chap-pro/id6754101547)

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

**In-app purchases:** none


## Frequently asked questions

### Is CRSA free?

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

### Is Doc Chap Pro free?

Doc Chap Pro is free to download, with no in-app purchases.

### Do CRSA or Doc Chap Pro have ads?

Neither CRSA nor Doc Chap Pro shows ads.

### Which is updated more often, CRSA or Doc Chap Pro?

CRSA ships an update every 6 weeks, and Doc Chap Pro every 3 months. Most recently, CRSA was updated on September 18, 2026 and Doc Chap Pro on September 12, 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.*