# Thoracic Lymph Node Map vs ContrastRx

The clearest difference is review sentiment: Thoracic Lymph Node Map at 100% against ContrastRx's 50%. Thoracic Lymph Node Map also leads on rating (4.8 vs 4.4). ContrastRx's advantage is update cadence (every 3 weeks vs every 7 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Thoracic Lymph Node Map holds the better App Store score, 4.8 against 4.4. Both are backed by a comparable volume of ratings — 25 and 9 respectively. Written reviews point the same way: 100% of Thoracic Lymph Node Map's written reviews are positive against 50% of ContrastRx's.

Thoracic Lymph Node Map ships an update every 7 months, ContrastRx every 3 weeks. The most recent releases landed on September 7, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Thoracic Lymph Node Map | ContrastRx |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (25 ratings)](https://appshunter.io/ios/app/thoracic-lymph-node-map/id531517393/reviews)** | [4.4 (9 ratings)](https://appshunter.io/ios/app/contrastrx/id619478666/reviews) |
| Number of ratings | **25** | 9 |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 128 MB | 9 MB |
| Requires iOS | 16.6 | 16.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 17+ |
| Developer | [RADIOLOGiQ, LLC](https://appshunter.io/developer/519524135) | [Mayo Clinic](https://appshunter.io/developer/350350016) |

## What reviewers say

### Thoracic Lymph Node Map

[App page](https://appshunter.io/ios/app/thoracic-lymph-node-map/id531517393)

This clinical decision-support tool helps healthcare professionals evaluate and locate thoracic lymph node stations on CT scans. It offers a color-coded map with definitions, N-category information, and sampling options, adapted from IASLC guidelines.

**Highlights:** Color-coded IASLC lymph node map, Anatomic definitions and N-category info, CT-based station overlays, Station detail cards, Common issues insights, Offline access

**Features:** macOS Compatibility

**In-app purchases:** none


### ContrastRx

[App page](https://appshunter.io/ios/app/contrastrx/id619478666)

Provides quick access to treatment regimens for life-threatening reactions to radiographic contrast agents. Includes clinical descriptions, visual examples, and treatment protocols, along with helpful calculators and information on nephrogenic systemic fibrosis.

**Highlights:** Treatment regimens for contrast reactions, Clinical descriptions and pictorial examples, eGFR calculator, Pediatric dose calculator, Steroid pretreatment regimens, Nephrogenic systemic fibrosis overview

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Thoracic Lymph Node Map free?

Thoracic Lymph Node Map is free to download, with no in-app purchases.

### Is ContrastRx free?

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

### Which has better reviews, Thoracic Lymph Node Map or ContrastRx?

Thoracic Lymph Node Map is rated higher. Thoracic Lymph Node Map averages 4.8 out of 5 from 25 ratings, while ContrastRx averages 4.4 from 9 ratings.

### Do Thoracic Lymph Node Map or ContrastRx have ads?

Neither Thoracic Lymph Node Map nor ContrastRx shows ads.

### Which is updated more often, Thoracic Lymph Node Map or ContrastRx?

Thoracic Lymph Node Map ships an update every 7 months, and ContrastRx every 3 weeks. Most recently, Thoracic Lymph Node Map was updated on September 7, 2026 and ContrastRx on September 14, 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.*