# CTCAE 6 Pro vs ONS Congress 2026

The clearest difference is rating: CTCAE 6 Pro at 5.0 against ONS Congress 2026's 1.0. CTCAE 6 Pro also leads on ratings volume (10 vs 2). ONS Congress 2026's advantage is in-app purchases (none vs 2). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. CTCAE 6 Pro sells 2 in-app purchases, starting at $1.99 per month. ONS Congress 2026 asks for nothing beyond the download.

CTCAE 6 Pro holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: CTCAE 6 Pro has 10 ratings behind it against 2, so its average is the more settled of the two.

## The numbers

| Metric | CTCAE 6 Pro | ONS Congress 2026 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (10 ratings)](https://appshunter.io/ios/app/ctcae-6-pro/id1625560237/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/ons-congress-2026/id6753676060/reviews) |
| Number of ratings | **10** | 2 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Monetization | Freemium | **Free** |
| Size | 87 MB | 12 MB |
| Requires iOS | 15.6 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Koichiro Watanabe](https://appshunter.io/developer/1077985400) | [JMarquardt Technologies GmbH](https://appshunter.io/developer/526168096) |

## 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 |


### ONS Congress 2026

[App page](https://appshunter.io/ios/app/ons-congress-2026/id6753676060)

Easily navigate the 51st Annual ONS Congress. Plan your schedule, explore exhibitors and posters, and access helpful conference information. Evaluate sessions on the go to earn NCPD contact hours.

**Highlights:** Personalized session scheduling, Exhibitor directory, Poster browsing, Conference information, Session evaluation for NCPD hours

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

**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 ONS Congress 2026 free?

ONS Congress 2026 is free to download, with no in-app purchases.

### Which has better reviews, CTCAE 6 Pro or ONS Congress 2026?

CTCAE 6 Pro is rated higher. CTCAE 6 Pro averages 5.0 out of 5 from 10 ratings, while ONS Congress 2026 averages 1.0 from 2 ratings.

### Do CTCAE 6 Pro or ONS Congress 2026 have ads?

Neither CTCAE 6 Pro nor ONS Congress 2026 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.*