# Note, Feynman | Briefly AI vs MasteryAI

The clearest difference is monetization model: MasteryAI at free with in-app purchases against Note, Feynman | Briefly AI's subscription. MasteryAI also leads on ratings volume (3 vs 1). On price, rating, review sentiment and update cadence there is nothing between them.

Both are free to download. Note, Feynman | Briefly AI sells 4 in-app purchases, starting at $8.99 per 7 days and MasteryAI sells 3 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Note, Feynman | Briefly AI against 5.0 for MasteryAI. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Note, Feynman | Briefly AI ships an update every 8 days, MasteryAI every 2 weeks. The most recent releases landed on October 22, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Note, Feynman | Briefly AI | MasteryAI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/note-feynman-briefly-ai/id6745227334/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/masteryai-feynman-ai-study/id6756033151/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 2 weeks |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 84 MB | 58 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Saqer Alshukaili](https://appshunter.io/developer/1773147914) | [Tu Tran](https://appshunter.io/developer/1858113571) |

## What reviewers say

### Note, Feynman | Briefly AI

[App page](https://appshunter.io/ios/app/note-feynman-briefly-ai/id6745227334)

Transform information into organized knowledge for faster learning. Import content from various sources, generate AI summaries, create flashcards, and visualize concepts with mind maps. Engage with AI chat and a unique Feynman test mode to deepen understanding.

**Highlights:** One-tap content import, AI summaries and key points, Spaced repetition flashcards, Interactive mind maps, Feynman Test Mode, Contextual AI chat, Cross-device sync

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Briefly AI weekly pro access | $8.99 | per 7 days |
| Briefly AI monthly Pro access | $17.99 | per month |
| Yearly Pro Accesss Promo | $49.99 | per year |
| Briefly AI yearly pro access | $89.99 | per year |


### 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 Note, Feynman | Briefly AI free?

Note, Feynman | Briefly AI is free to download, with in-app purchases available.

### Is MasteryAI free?

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

### Which has better reviews, Note, Feynman | Briefly AI or MasteryAI?

Note, Feynman | Briefly AI and MasteryAI are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do Note, Feynman | Briefly AI or MasteryAI have ads?

Neither Note, Feynman | Briefly AI nor MasteryAI shows ads.

### Which is updated more often, Note, Feynman | Briefly AI or MasteryAI?

Note, Feynman | Briefly AI ships an update every 8 days, and MasteryAI every 2 weeks. Most recently, Note, Feynman | Briefly AI was updated on October 22, 2026 and MasteryAI on October 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.*