# CTCAE 5 Pro vs Shared Investigator Platform

CTCAE 5 Pro and Shared Investigator Platform both sit at 4.9 stars, but that hides the real split: 100% of Shared Investigator Platform's written reviews are positive against 0% of CTCAE 5 Pro's. Shared Investigator Platform also leads on in-app purchases (none vs 2). CTCAE 5 Pro's advantage is update cadence (every 5 weeks vs every 6 months) and ratings volume (42 vs 5). On price, rating, ads and device support there is nothing between them.

Both are free to download. CTCAE 5 Pro sells 2 in-app purchases, starting at $1.99 per month. Shared Investigator Platform asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for CTCAE 5 Pro against 5.0 for Shared Investigator Platform. That said, the two scores are not equally well evidenced: CTCAE 5 Pro has 42 ratings behind it against 5, so its average is the more settled of the two. Written reviews are what separate them: 0% of CTCAE 5 Pro's written reviews are positive against 100% of Shared Investigator Platform's.

CTCAE 5 Pro ships an update every 5 weeks, Shared Investigator Platform every 6 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | CTCAE 5 Pro | Shared Investigator Platform |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (42 ratings)](https://appshunter.io/ios/app/ctcae-5-pro/id1625569535/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/shared-investigator-platform/id6450245868/reviews)** |
| Number of ratings | **42** | 5 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 6 months |
| Monetization | Freemium | **Free** |
| Size | 60 MB | 49 MB |
| Requires iOS | **15.5** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Koichiro Watanabe](https://appshunter.io/developer/1077985400) | [Cognizant Technology Solutions](https://appshunter.io/developer/387144373) |

## What reviewers say

### CTCAE 5 Pro

[App page](https://appshunter.io/ios/app/ctcae-5-pro/id1625569535)

This app provides easy access to CTCAE documentation and supports local data storage for enhanced privacy. Premium features include version comparison, advanced note-taking, custom app creation from spreadsheets, and flexible data backup options.

**Highlights:** Streamlined CTCAE Document Access, Local Data Storage, Version Comparison Tool, Advanced Notes Feature, Custom App Creation, Flexible Backup and Archiving

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $1.99 | per month |
| Annual subscription | $9.99 | per year |


### Shared Investigator Platform

[App page](https://appshunter.io/ios/app/shared-investigator-platform/id6450245868)

This mobile application allows clinical trial site users to manage their actions on the Shared Investigator Platform. It facilitates easy login, E-signing, reviewing pending actions, accepting study invitations, and managing study staff. Users can also access study documents, complete tasks, and receive important notifications.

**Highlights:** User-friendly interface, E-sign functionality, Biometric authentication, Review pending actions, Accept study invitations, Manage study staff, Access study documents

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is CTCAE 5 Pro free?

CTCAE 5 Pro is free to download, with in-app purchases available.

### Is Shared Investigator Platform free?

Shared Investigator Platform is free to download, with no in-app purchases.

### Which has better reviews, CTCAE 5 Pro or Shared Investigator Platform?

Shared Investigator Platform is rated higher. CTCAE 5 Pro averages 4.9 out of 5 from 42 ratings, while Shared Investigator Platform averages 5.0 from 5 ratings.

### Do CTCAE 5 Pro or Shared Investigator Platform have ads?

Neither CTCAE 5 Pro nor Shared Investigator Platform shows ads.

### Which is updated more often, CTCAE 5 Pro or Shared Investigator Platform?

CTCAE 5 Pro ships an update every 5 weeks, and Shared Investigator Platform every 6 months. Most recently, CTCAE 5 Pro was updated on November 3, 2026 and Shared Investigator Platform on November 3, 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.*