# LEKAT vs Feynman AI Study

The clearest difference is in-app purchases: LEKAT at none against Feynman AI Study's 3. Feynman AI Study's advantage is update cadence (every 6 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Feynman AI Study sells 3 in-app purchases, starting at $6.99 per 7 days. LEKAT asks for nothing beyond the download.

LEKAT ships an update monthly, Feynman AI Study every 6 days. The most recent releases landed on October 12, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | LEKAT | Feynman AI Study |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 6 days** |
| Size | 3 MB | 27 MB |
| Requires iOS | **17.0** | 18.5 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kurniadi .](https://appshunter.io/developer/1519464644) | [Erkan Sevim](https://appshunter.io/developer/1759171363) |

## What reviewers say

### LEKAT

[App page](https://appshunter.io/ios/app/lekat/id6767226018)

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

**In-app purchases:** none


### Feynman AI Study

[App page](https://appshunter.io/ios/app/feynman-ai-study-studara/id6768278868)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access | $6.99 | per 7 days |
| Unlimited Access | $14.99 | per month |
| Unlimited Access | $49.99 | per year |


## Frequently asked questions

### Is LEKAT free?

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

### Is Feynman AI Study free?

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

### Do LEKAT or Feynman AI Study have ads?

Neither LEKAT nor Feynman AI Study shows ads.

### Which is updated more often, LEKAT or Feynman AI Study?

LEKAT ships an update monthly, and Feynman AI Study every 6 days. Most recently, LEKAT was updated on October 12, 2026 and Feynman AI Study on October 10, 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.*