# Feynman vs Einstein AI

The clearest difference is in-app purchases: Feynman at none against Einstein AI's 2. Feynman also leads on update cadence (every 3 days vs every 2 weeks) and iOS requirement (9.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Einstein AI sells 2 in-app purchases, starting at $4.99 per 7 days. Feynman asks for nothing beyond the download.

Feynman ships an update every 3 days, Einstein AI every 2 weeks. The most recent releases landed on September 10, 2026 and September 2, 2026 respectively.

## The numbers

| Metric | Feynman | Einstein AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (184 ratings)](https://appshunter.io/ios/app/einstein-ai-learn-and-memorize/id6739162816/reviews)** |
| Number of ratings | — | **184** |
| Positive reviews | — | 22.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 2 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 17 MB | 66 MB |
| Requires iOS | **9.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mohamed Kamal](https://appshunter.io/developer/1484659884) | [Berkay Gemici](https://appshunter.io/developer/1761248495) |

## What reviewers say

### Feynman

[App page](https://appshunter.io/ios/app/feynman/id1486605848)

**Features:** macOS Compatibility

**In-app purchases:** none


### Einstein AI

[App page](https://appshunter.io/ios/app/einstein-ai-learn-and-memorize/id6739162816)

This app uses the Feynman Learning Technique to help you master any subject through voice interaction. Explain concepts aloud, take voice-powered quizzes, and receive detailed performance analysis to identify areas for improvement.

**Highlights:** Voice-powered concept explanation, Dynamically generated voice quizzes, Detailed performance analysis, Subtopic strength identification, Hands-free microphone interaction, Customizable learning topics

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro | $4.99 | per 7 days |
| Yearly Pro | $39.99 | per year |


## Frequently asked questions

### Is Feynman free?

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

### Is Einstein AI free?

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

### Do Feynman or Einstein AI have ads?

Neither Feynman nor Einstein AI shows ads.

### Which is updated more often, Feynman or Einstein AI?

Feynman ships an update every 3 days, and Einstein AI every 2 weeks. Most recently, Feynman was updated on September 10, 2026 and Einstein AI on September 2, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*