# useit vs Perfusion Mastery

The clearest difference is in-app purchases: useit at none against Perfusion Mastery's 2. useit also leads on iOS requirement (15.6 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Perfusion Mastery sells 2 in-app purchases, starting at $8.99 per month. useit asks for nothing beyond the download.

useit ships an update fortnightly, Perfusion Mastery every 2 weeks. The most recent releases landed on September 30, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | useit | Perfusion Mastery |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (1 ratings)](https://appshunter.io/ios/app/perfusion-mastery-ccp-ebcp/id6761089049/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 weeks |
| Monetization | — | Freemium |
| Size | 61 MB | 52 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Suresh Paranjothy](https://appshunter.io/developer/1587131308) | [Abdelkhalek Mouloudi](https://appshunter.io/developer/1887741633) |

## What reviewers say

### useit

[App page](https://appshunter.io/ios/app/useit/id6747667589)

**Features:** macOS Compatibility

**In-app purchases:** none


### Perfusion Mastery

[App page](https://appshunter.io/ios/app/perfusion-mastery-ccp-ebcp/id6761089049)

Prepare for cardiovascular perfusion board exams with extensive practice questions and study tools. Features include a timed exam simulator, intelligent flashcards, and custom quiz building. Offers detailed explanations and progress tracking to aid learning.

**Highlights:** 4,000 expert-level MCQs, 18 curriculum chapters, Timed exam simulator, Intelligent flashcards, Custom quiz builder, Performance tracking, Detailed explanations

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly Access | $8.99 | per month |
| Premium Annual Access | $89.99 | per year |


## Frequently asked questions

### Is useit free?

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

### Is Perfusion Mastery free?

Perfusion Mastery is free to download, with in-app purchases available.

### Do useit or Perfusion Mastery have ads?

Neither useit nor Perfusion Mastery shows ads.

### Which is updated more often, useit or Perfusion Mastery?

useit ships an update fortnightly, and Perfusion Mastery every 2 weeks. Most recently, useit was updated on September 30, 2026 and Perfusion Mastery on October 2, 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.*