# EGD2021 vs Extension AI

The clearest difference is price: EGD2021 at Free against Extension AI's $2.99. Extension AI's advantage is update cadence (every 10 months vs every 25 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

EGD2021 is free to download; Extension AI costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

EGD2021 ships an update every 25 months, Extension AI every 10 months. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | EGD2021 | Extension AI |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/extension-ai/id6742454059/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 40.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 25 months | **Every 10 months** |
| Monetization | — | Paid |
| Size | 1 MB | 3 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Shiu Yin Yuen](https://appshunter.io/developer/1569119882) | [Pierre Stanislas](https://appshunter.io/developer/1261009329) |

## What reviewers say

### EGD2021

[App page](https://appshunter.io/ios/app/egd2021/id1559438204)

**Features:** macOS Compatibility

**In-app purchases:** none


### Extension AI

[App page](https://appshunter.io/ios/app/extension-ai/id6742454059)

Enhance your web browsing with an AI assistant that summarizes, fact-checks, and explains content directly within your browser. Interact with AI to get concise summaries, verify information, and understand complex topics easily.

**Highlights:** Summarize articles, Fact-check information, Explain content (ELI5), Translate text, Generate questions, Analyze entire webpages

**Features:** Safari Extension, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is EGD2021 free?

EGD2021 is free to download, with no in-app purchases.

### Is Extension AI free?

Extension AI costs $2.99, with no in-app purchases.

### Do EGD2021 or Extension AI have ads?

Neither EGD2021 nor Extension AI shows ads.

### Which is updated more often, EGD2021 or Extension AI?

EGD2021 ships an update every 25 months, and Extension AI every 10 months. Most recently, EGD2021 was updated on November 7, 2026 and Extension AI on October 30, 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.*