# CTisus iPearls vs Lung CT Field Guide

The clearest difference is rating: Lung CT Field Guide at 5.0 against CTisus iPearls's 4.7. Lung CT Field Guide also leads on iOS requirement (8.0 vs 15.6). CTisus iPearls's advantage is ratings volume (42 vs 11). On price, review sentiment, update cadence and ads there is nothing between them.

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

Lung CT Field Guide holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 42 and 11 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Both ship on a similar rhythm, roughly every 6 months. The most recent releases landed on October 29, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | CTisus iPearls | Lung CT Field Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (42 ratings)](https://appshunter.io/ios/app/ctisus-ipearls/id687350624/reviews) | **[5.0 (11 ratings)](https://appshunter.io/ios/app/lung-ct-field-guide/id895302733/reviews)** |
| Number of ratings | **42** | 11 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | Every 6 months |
| Monetization | Free | Free |
| Size | 137 MB | 58 MB |
| Requires iOS | 15.6 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Elliot Fishman](https://appshunter.io/developer/399024444) | [RADIOLOGiQ, LLC](https://appshunter.io/developer/519524135) |

## What reviewers say

### CTisus iPearls

[App page](https://appshunter.io/ios/app/ctisus-ipearls/id687350624)

This app provides diagnostic radiologists with valuable insights and facts, known as "pearls," to aid in correct diagnoses and understanding of radiologic images. It organizes these pearls across 28 popular categories and includes a search feature for easy access to thousands of pieces of knowledge.

**Highlights:** Diagnostic radiology pearls, Thousands of insights, 28 popular categories, Search functionality, Radiologic image understanding

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

**In-app purchases:** none


### Lung CT Field Guide

[App page](https://appshunter.io/ios/app/lung-ct-field-guide/id895302733)

This app helps physicians, especially radiologists and pulmonologists, interpret lung CT scans. It features a library of CT images and illustrations of lung diseases, along with an experimental engine to suggest differential diagnoses based on observed findings.

**Highlights:** Lung CT image library, Color graphic illustrations of lung disease patterns, Experimental differential diagnosis engine, Organized by CT findings and distribution, Over 100 curated images and illustrations

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

**In-app purchases:** none


## Frequently asked questions

### Is CTisus iPearls free?

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

### Is Lung CT Field Guide free?

Lung CT Field Guide is free to download, with no in-app purchases.

### Which has better reviews, CTisus iPearls or Lung CT Field Guide?

Lung CT Field Guide is rated higher. CTisus iPearls averages 4.7 out of 5 from 42 ratings, while Lung CT Field Guide averages 5.0 from 11 ratings.

### Do CTisus iPearls or Lung CT Field Guide have ads?

Neither CTisus iPearls nor Lung CT Field Guide shows ads.

### Which is updated more often, CTisus iPearls or Lung CT Field Guide?

CTisus iPearls ships an update every 6 months, and Lung CT Field Guide every 6 months. Most recently, CTisus iPearls was updated on October 29, 2026 and Lung CT Field Guide on October 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.*