# CT vs Global BioWatch

The clearest difference is in-app purchases: CT at none against Global BioWatch's 1. CT also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.4). Global BioWatch's advantage is ads (none vs shown) and update cadence (weekly vs every 12 months). On price there is nothing between them.

Both are free to download. Global BioWatch sells 1 one-off in-app purchase. CT asks for nothing beyond the download.

CT ships an update every 12 months, Global BioWatch weekly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | CT | Global BioWatch |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (12 ratings)](https://appshunter.io/ios/app/ct-computed-tomography/id1562592280/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 12 months | **Weekly** |
| Monetization | Ad-supported | — |
| Size | 55 MB | 44 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Fabricio Tarter](https://appshunter.io/developer/1533271635) | [OMUR GOKMEN](https://appshunter.io/developer/6782850198) |

## What reviewers say

### CT

[App page](https://appshunter.io/ios/app/ct-computed-tomography/id1562592280)

This app provides a didactic and effective way for students, radiologists, and bio-image graduates to learn and reinforce their knowledge of computed tomography protocols. It features a human body model with selectable protocols, detailing essential information for each study.

**Highlights:** Human body model for protocol selection, Detailed protocol information, Indications and preparation guidance, Scout view and FOV details, Cut thickness and gap information, Window settings and reconstruction plans, Protocol-specific images

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

**In-app purchases:** none


### Global BioWatch

[App page](https://appshunter.io/ios/app/global-biowatch/id6798410107)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support Global BioWatch | $0.99 | one-time |


## Frequently asked questions

### Is CT free?

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

### Is Global BioWatch free?

Global BioWatch is free to download, with in-app purchases available.

### Do CT or Global BioWatch have ads?

CT shows ads; Global BioWatch does not.

### Which is updated more often, CT or Global BioWatch?

CT ships an update every 12 months, and Global BioWatch weekly. Most recently, CT was updated on November 3, 2026 and Global BioWatch on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*