# ASCO Guidelines vs CTCAE 6 Pro

The clearest difference is in-app purchases: ASCO Guidelines at none against CTCAE 6 Pro's 2. ASCO Guidelines also leads on ratings volume (257 vs 8) and iOS requirement (10.0 vs 15.6). CTCAE 6 Pro's advantage is update cadence (monthly vs every 5 months) and rating (5.0 vs 4.8). 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. ASCO Guidelines asks for nothing beyond the download.

CTCAE 6 Pro holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: ASCO Guidelines has 257 ratings behind it against 8, so its average is the more settled of the two.

ASCO Guidelines ships an update every 5 months, CTCAE 6 Pro monthly. The most recent releases landed on September 23, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | ASCO Guidelines | CTCAE 6 Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (257 ratings)](https://appshunter.io/ios/app/asco-guidelines/id1238827183/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/ctcae-6-pro/id1625560237/reviews)** |
| Number of ratings | **257** | 8 |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | **Free** | Freemium |
| Size | 411 MB | 87 MB |
| Requires iOS | **10.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [American Society of Clinical Oncology](https://appshunter.io/developer/1513043539) | [Koichiro Watanabe](https://appshunter.io/developer/1077985400) |

## What reviewers say

### ASCO Guidelines

[App page](https://appshunter.io/ios/app/asco-guidelines/id1238827183)

Access comprehensive cancer care guidelines and interactive tools to inform treatment decisions. This app supports healthcare providers, patients, and caregivers in implementing recommended cancer care options for various cancer types, aiming to improve the quality of care.

**Highlights:** Guideline recommendations for cancer care, Interactive treatment decision tools, Supports healthcare providers, Informs patients and caregivers, Covers various cancer types, Regularly updated content

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

**In-app purchases:** none


### CTCAE 6 Pro

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

Easily review and annotate medical toxicity criteria. Bookmark adverse events, search keywords, and organize entries chronologically. Offers local data storage and optional premium features for advanced note-taking and data export.

**Highlights:** Quick CTCAE 6.0 content access, Unlimited adverse event bookmarking, Keyword search with highlighting, Local data storage, Version comparison (5.0 ⇄ 6.0), Smart notes and timeline management, 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 |


## Frequently asked questions

### Is ASCO Guidelines free?

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

### Is CTCAE 6 Pro free?

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

### Which has better reviews, ASCO Guidelines or CTCAE 6 Pro?

CTCAE 6 Pro is rated higher. ASCO Guidelines averages 4.8 out of 5 from 257 ratings, while CTCAE 6 Pro averages 5.0 from 8 ratings.

### Do ASCO Guidelines or CTCAE 6 Pro have ads?

Neither ASCO Guidelines nor CTCAE 6 Pro shows ads.

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

ASCO Guidelines ships an update every 5 months, and CTCAE 6 Pro monthly. Most recently, ASCO Guidelines was updated on September 23, 2026 and CTCAE 6 Pro on September 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.*