# EBMcalc G.I. vs CTisus CT Quick Guides

The clearest difference is price: CTisus CT Quick Guides at Free against EBMcalc G.I.'s $4.99. CTisus CT Quick Guides also leads on update cadence (every 6 months vs every 33 months). EBMcalc G.I.'s advantage is iOS requirement (10.0 vs 16.6). On ads, in-app purchases and device support there is nothing between them.

CTisus CT Quick Guides is free to download; EBMcalc G.I. costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

EBMcalc G.I. ships an update every 33 months, CTisus CT Quick Guides every 6 months. The most recent releases landed on October 13, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | EBMcalc G.I. | CTisus CT Quick Guides |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | — | **[4.8 (4 ratings)](https://appshunter.io/ios/app/ctisus-ct-quick-guides/id6743173540/reviews)** |
| Number of ratings | — | **4** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 33 months | **Every 6 months** |
| Monetization | — | Free |
| Size | 3 MB | 52 MB |
| Requires iOS | **10.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Foundation Internet Services, LLC](https://appshunter.io/developer/303471468) | [Elliot Fishman](https://appshunter.io/developer/399024444) |

## What reviewers say

### EBMcalc G.I.

[App page](https://appshunter.io/ios/app/ebmcalc-gi/id362365947)

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

**In-app purchases:** none


### CTisus CT Quick Guides

[App page](https://appshunter.io/ios/app/ctisus-ct-quick-guides/id6743173540)

This medical reference app provides radiologists and other healthcare professionals with curated CT images, imaging pearls, and clinical findings across 17 diverse topics. Key information is organized into critical findings, etiology, epidemiology, presentation, and prognosis for each subject.

**Highlights:** Curated CT images, Imaging pearls, Clinical findings, 17 topic sections, Critical CT findings, Etiology, epidemiology, presentation, prognosis

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

**In-app purchases:** none


## Frequently asked questions

### Is EBMcalc G.I. free?

EBMcalc G.I. costs $4.99, with no in-app purchases.

### Is CTisus CT Quick Guides free?

CTisus CT Quick Guides is free to download, with no in-app purchases.

### Do EBMcalc G.I. or CTisus CT Quick Guides have ads?

Neither EBMcalc G.I. nor CTisus CT Quick Guides shows ads.

### Which is updated more often, EBMcalc G.I. or CTisus CT Quick Guides?

EBMcalc G.I. ships an update every 33 months, and CTisus CT Quick Guides every 6 months. Most recently, EBMcalc G.I. was updated on October 13, 2026 and CTisus CT Quick Guides on October 8, 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.*