# Feynman AI vs Kron

The clearest difference is device support: Feynman AI at 3 against Kron's 1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Feynman AI sells 9 in-app purchases, starting at $5.99 per 7 days and Kron sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Feynman AI ships an update fortnightly, Kron every 2 weeks. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Feynman AI | Kron |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (57 ratings)](https://appshunter.io/ios/app/feynman-ai-study-and-memorize/id6738724586/reviews)** | — |
| Number of ratings | **57** | — |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 61 MB | 3 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Feynman EinsteinAI Note Taker OU](https://appshunter.io/developer/1782064427) | [Adis Veletanlic](https://appshunter.io/developer/1617642866) |

## What reviewers say

### Feynman AI

[App page](https://appshunter.io/ios/app/feynman-ai-study-and-memorize/id6738724586)

This learning assistant transforms various content like YouTube videos, audio, and PDFs into transcriptions, summaries, and quizzes. It helps users organize notes and access materials on any device for efficient studying.

**Highlights:** Accurate transcriptions, Concise summaries, Automatic quiz generation, Organized notes, Cross-device accessibility, Document analysis

**Features:** Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $5.99 | per 7 days |
| Monthly Subscription | $14.99 | per month |
| Monthly Subscription | $15.99 | per month |
| 3 Month Subscription | $29.99 | per 3 months |
| Yearly Subscription | $29.99 | per year |
| Yearly Subscription | $39.99 | per year |
| Yearly Subscription | $69.99 | per year |
| 12 Month Subscription | $79.99 | per year |
| Lifetime Access | $89.99 | one-time |


### Kron

[App page](https://appshunter.io/ios/app/kron/id6764824643)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kron Pro | $3.99 | one-time |


## Frequently asked questions

### Is Feynman AI free?

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

### Is Kron free?

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

### Do Feynman AI or Kron have ads?

Neither Feynman AI nor Kron shows ads.

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

Feynman AI ships an update fortnightly, and Kron every 2 weeks. Most recently, Feynman AI was updated on October 27, 2026 and Kron on October 24, 2026.

---

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