# Closer Brasil vs MasteryAI

The clearest difference is in-app purchases: Closer Brasil at none against MasteryAI's 3. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. MasteryAI sells 3 in-app purchases, starting at $5.99 per 7 days. Closer Brasil asks for nothing beyond the download.

## The numbers

| Metric | Closer Brasil | MasteryAI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/masteryai-feynman-ai-study/id6756033151/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 37 MB | 58 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mizael Xavier](https://appshunter.io/developer/1799469770) | [Tu Tran](https://appshunter.io/developer/1858113571) |

## What reviewers say

### Closer Brasil

[App page](https://appshunter.io/ios/app/closer-brasil/id6744329607)

**Features:** macOS Compatibility

**In-app purchases:** none


### MasteryAI

[App page](https://appshunter.io/ios/app/masteryai-feynman-ai-study/id6756033151)

Transform raw content like lectures, PDFs, and audio into structured, high-retention study notes using science-backed learning techniques. Engage with AI-powered Feynman sessions, adaptive explanations, and dynamic quizzes to deepen understanding and combat information overload.

**Highlights:** AI-powered note generation, Feynman Technique sessions, Adaptive explanations, Cognitive science quizzes, Spaced repetition flashcards, Concept mindmaps, Multilingual support

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MasteryAI Pro (Weekly) | $5.99 | per 7 days |
| MasteryAI Pro (Monthly) | $14.99 | per month |
| MasteryAI Pro (Annual) | $99.99 | per year |


## Frequently asked questions

### Is Closer Brasil free?

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

### Is MasteryAI free?

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

### Do Closer Brasil or MasteryAI have ads?

Neither Closer Brasil nor MasteryAI shows ads.

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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.*