# MasteryAI vs BrainDen

The clearest difference is update cadence: MasteryAI at every 2 weeks against BrainDen's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. MasteryAI sells 3 in-app purchases, starting at $5.99 per 7 days and BrainDen sells 3 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.

MasteryAI ships an update every 2 weeks, BrainDen monthly. The most recent releases landed on August 15, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | MasteryAI | BrainDen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/masteryai-feynman-ai-study/id6756033151/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 48 MB | 49 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Tu Tran](https://appshunter.io/developer/1858113571) | [Ogbemudia Terry Osayawe](https://appshunter.io/developer/1678791059) |

## What reviewers say

### 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 |


### BrainDen

[App page](https://appshunter.io/ios/app/brainden-lecture-note-taker/id6757434859)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BrainDen Pro - Monthly | $19.99 | per month |
| 6-Month Pro Subscription | $49.99 | per 6 months |
| BrainDen Pro - Annual Subscription | $99.99 | per year |


## Frequently asked questions

### Is MasteryAI free?

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

### Is BrainDen free?

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

### Do MasteryAI or BrainDen have ads?

Neither MasteryAI nor BrainDen shows ads.

### Which is updated more often, MasteryAI or BrainDen?

MasteryAI ships an update every 2 weeks, and BrainDen monthly. Most recently, MasteryAI was updated on August 15, 2026 and BrainDen on September 9, 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.*