# CTCAE 6 Pro vs ACR

The clearest difference is in-app purchases: ACR at none against CTCAE 6 Pro's 2. ACR also leads on iOS requirement (12.0 vs 15.6). CTCAE 6 Pro's advantage is update cadence (every 3 weeks vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. CTCAE 6 Pro sells 2 in-app purchases, starting at $1.99 per month. ACR asks for nothing beyond the download.

CTCAE 6 Pro ships an update every 3 weeks, ACR every 2 months. The most recent releases landed on October 30, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | CTCAE 6 Pro | ACR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (10 ratings)](https://appshunter.io/ios/app/ctcae-6-pro/id1625560237/reviews)** | — |
| Number of ratings | **10** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Freemium | — |
| Size | 87 MB | 80 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Koichiro Watanabe](https://appshunter.io/developer/1077985400) | [ERT,INC](https://appshunter.io/developer/1160214546) |

## What reviewers say

### CTCAE 6 Pro

[App page](https://appshunter.io/ios/app/ctcae-6-pro/id1625560237)

This app provides easy access to CTCAE 6.0 content, allowing users to bookmark adverse events, search for keywords, and organize notes. It offers features for version comparison, data export, and timeline management for premium subscribers.

**Highlights:** Quick CTCAE 6.0 content access, Unlimited bookmarking of adverse events, Keyword search with highlighting, Local data storage for privacy, Version comparison (5.0 vs 6.0), Smart notes and chronological organization, Spreadsheet to custom list app conversion

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plan – Monthly | $1.99 | per month |
| Premium Plan – Annual | $9.99 | per year |


### ACR

[App page](https://appshunter.io/ios/app/acr-2316-101/id6648775065)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CTCAE 6 Pro free?

CTCAE 6 Pro is free to download, with in-app purchases available.

### Is ACR free?

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

### Do CTCAE 6 Pro or ACR have ads?

Neither CTCAE 6 Pro nor ACR shows ads.

### Which is updated more often, CTCAE 6 Pro or ACR?

CTCAE 6 Pro ships an update every 3 weeks, and ACR every 2 months. Most recently, CTCAE 6 Pro was updated on October 30, 2026 and ACR 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.*