# OwlNote TLDL Notes Feynman AI vs MasteryAI

The clearest difference is update cadence: MasteryAI at every 2 weeks against OwlNote TLDL Notes Feynman AI's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. OwlNote TLDL Notes Feynman AI sells 3 in-app purchases, starting at $3.99 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.

OwlNote TLDL Notes Feynman AI ships an update every 2 months, MasteryAI every 2 weeks. The most recent releases landed on September 20, 2026 and August 15, 2026 respectively.

## The numbers

| Metric | OwlNote TLDL Notes Feynman AI | MasteryAI |
| --- | --- | --- |
| 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 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 55 MB | 48 MB |
| Requires iOS | 15.1 | **14.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Olga Krolikowska](https://appshunter.io/developer/1727507942) | [Tu Tran](https://appshunter.io/developer/1858113571) |

## What reviewers say

### OwlNote TLDL Notes Feynman AI

[App page](https://appshunter.io/ios/app/owlnote-tldl-notes-feynman-ai/id6746122376)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $3.99 | per 7 days |
| Monthly | $7.99 | per month |
| Yearly | $24.99 | 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 OwlNote TLDL Notes Feynman AI free?

OwlNote TLDL Notes Feynman AI is free to download, with in-app purchases available.

### Is MasteryAI free?

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

### Do OwlNote TLDL Notes Feynman AI or MasteryAI have ads?

Neither OwlNote TLDL Notes Feynman AI nor MasteryAI shows ads.

### Which is updated more often, OwlNote TLDL Notes Feynman AI or MasteryAI?

OwlNote TLDL Notes Feynman AI ships an update every 2 months, and MasteryAI every 2 weeks. Most recently, OwlNote TLDL Notes Feynman AI was updated on September 20, 2026 and MasteryAI on August 15, 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.*