# CTC vs ASCO Guidelines

The clearest difference is price: ASCO Guidelines at Free against CTC's $3.99. ASCO Guidelines also leads on in-app purchases (none vs 1) and iOS requirement (10.0 vs 17.6). On review sentiment, update cadence, ads and device support there is nothing between them.

ASCO Guidelines is free to download; CTC costs $3.99 up front. CTC sells 1 one-off in-app purchase. ASCO Guidelines asks for nothing beyond the download.

CTC ships an update every 2 months, ASCO Guidelines every 5 months. The most recent releases landed on October 1, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | CTC | ASCO Guidelines |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | — | **[4.8 (257 ratings)](https://appshunter.io/ios/app/asco-guidelines/id1238827183/reviews)** |
| Number of ratings | — | **257** |
| Positive reviews | 55.6% of reviews | **57.1% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Paid | **Free** |
| Size | 2 MB | 411 MB |
| Requires iOS | 17.6 | **10.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Arpacore B.V.](https://appshunter.io/developer/1441928570) | [American Society of Clinical Oncology](https://appshunter.io/developer/1513043539) |

## What reviewers say

### CTC

[App page](https://appshunter.io/ios/app/ctc-ae-plus/id349258523)

This medical reference app provides quick access to standardized adverse event criteria and grading scales for oncology research. It allows for efficient logging, tracking, and reporting of patient events, including performance scores and custom entries. Data is kept strictly on-device for privacy and compliance.

**Highlights:** CTCAE v4 and v5 reference, Performance score integration (Karnofsky, ECOG, Lansky), Advanced adverse event logger, Custom event creation, CSV data import/export, On-device data storage

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Adverse Event Logger | $3.99 | one-time |


### 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


## Frequently asked questions

### Is CTC free?

CTC costs $3.99, and also offers in-app purchases.

### Is ASCO Guidelines free?

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

### Do CTC or ASCO Guidelines have ads?

Neither CTC nor ASCO Guidelines shows ads.

### Which is updated more often, CTC or ASCO Guidelines?

CTC ships an update every 2 months, and ASCO Guidelines every 5 months. Most recently, CTC was updated on October 1, 2026 and ASCO Guidelines on October 16, 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.*