# ARM APP vs UDC

The clearest difference is iOS requirement: ARM APP at 13.4 against UDC's 15.0. On price, update cadence, 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.

ARM APP ships an update every 2 weeks, UDC every 3 weeks. The most recent releases landed on September 21, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | ARM APP | UDC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/arm-app/id1513228604/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 76.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free | — |
| Size | 25 MB | 218 MB |
| Requires iOS | **13.4** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Lagom Startup Studio S.A.P.I. de C.V.](https://appshunter.io/developer/1513149270) | [Arturo Conde Perez](https://appshunter.io/developer/1622072131) |

## What reviewers say

### ARM APP

[App page](https://appshunter.io/ios/app/arm-app/id1513228604)

Prepare for medical residency exams with a question simulator featuring over 1,500 clinical case questions across 29 medical specialties. It offers a three-stage learning process with feedback and explanations to reinforce knowledge and help you achieve your specialist goal.

**Highlights:** Over 1,500 clinical case questions, Questions across 29 medical specialties, Three-stage learning process, Detailed feedback and explanations, Progress tracking by specialty, Resume progress anytime

**Features:** macOS Compatibility

**In-app purchases:** none


### UDC

[App page](https://appshunter.io/ios/app/udc/id1628882483)

**In-app purchases:** none


## Frequently asked questions

### Is ARM APP free?

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

### Is UDC free?

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

### Do ARM APP or UDC have ads?

Neither ARM APP nor UDC shows ads.

### Which is updated more often, ARM APP or UDC?

ARM APP ships an update every 2 weeks, and UDC every 3 weeks. Most recently, ARM APP was updated on September 21, 2026 and UDC on October 6, 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.*