# DeviceAID vs CRT Events App

The clearest difference is ads: CRT Events App at none against DeviceAID's shown. CRT Events App also leads on update cadence (every 9 days vs every 14 months) and iOS requirement (15.5 vs 18.0). On price, in-app purchases and device support there is nothing between them.

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

DeviceAID ships an update every 14 months, CRT Events App every 9 days. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | DeviceAID | CRT Events App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/deviceaid/id6449780080/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 14 months | **Every 9 days** |
| Monetization | Ad-supported | — |
| Size | 60 MB | 111 MB |
| Requires iOS | 18.0 | **15.5** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 12+ |
| Developer | [Cardiology Apps LLC](https://appshunter.io/developer/1639925847) | [Cardiovascular Research Technologies (CRT)](https://appshunter.io/developer/6774638856) |

## What reviewers say

### DeviceAID

[App page](https://appshunter.io/ios/app/deviceaid/id6449780080)

This medical app provides a searchable library of coronary intervention devices, categorized for easy access. It includes a basics section for introductions and quizzes to test knowledge, with explanations for correct answers.

**Highlights:** Searchable device library, Categorized device sections, Favorites list, Educational basics section, Quizzes with explanations

**Features:** macOS Compatibility

**In-app purchases:** none


### CRT Events App

[App page](https://appshunter.io/ios/app/crt-events-app/id6758950461)

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

**In-app purchases:** none


## Frequently asked questions

### Is DeviceAID free?

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

### Is CRT Events App free?

CRT Events App is free to download, with no in-app purchases.

### Do DeviceAID or CRT Events App have ads?

DeviceAID shows ads; CRT Events App does not.

### Which is updated more often, DeviceAID or CRT Events App?

DeviceAID ships an update every 14 months, and CRT Events App every 9 days. Most recently, DeviceAID was updated on October 27, 2026 and CRT Events App on October 25, 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.*