# Anti Noise Feynman vs Unfog

Anti Noise Feynman and Unfog are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Anti Noise Feynman sells 2 in-app purchases, starting at $9.99 per month and Unfog sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Anti Noise Feynman ships an update every 3 days, Unfog every 2 days. The most recent releases landed on October 8, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Anti Noise Feynman | Unfog |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/anti-noise-feynman-ai-study/id6770808616/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 days | **Every 2 days** |
| Monetization | Freemium | — |
| Size | 37 MB | 80 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Huy Nguyen](https://appshunter.io/developer/1896764157) | [BITSEC SP. Z O.O.](https://appshunter.io/developer/1801990616) |

## What reviewers say

### Anti Noise Feynman

[App page](https://appshunter.io/ios/app/anti-noise-feynman-ai-study/id6770808616)

This app transforms web content and notes into structured knowledge using AI. It generates Feynman-style summaries and spaced-repetition flashcards to aid learning. Daily curated "skills worth learning" are provided to help users grow.

**Highlights:** Feynman-style AI summaries, Spaced-repetition flashcards, Daily curated learning skills, On-device capture and sync, Share extension for content capture, Layered learning progression

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Anti Noise Pro - Monthly | $9.99 | per month |
| Anti Noise Pro - Annual | $59.99 | per year |


### Unfog

[App page](https://appshunter.io/ios/app/unfog-feynman-study-notes/id6776245365)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unfog weekly | $2.99 | per 7 days |
| Unfog Monthly | $17.99 | per month |
| Unfog Annual | $29.99 | per year |


## Frequently asked questions

### Is Anti Noise Feynman free?

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

### Is Unfog free?

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

### Do Anti Noise Feynman or Unfog have ads?

Neither Anti Noise Feynman nor Unfog shows ads.

### Which is updated more often, Anti Noise Feynman or Unfog?

Anti Noise Feynman ships an update every 3 days, and Unfog every 2 days. Most recently, Anti Noise Feynman was updated on October 8, 2026 and Unfog on October 25, 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.*