# 极相机 vs EchoRead

The clearest difference is in-app purchases: 极相机 at none against EchoRead's 8. 极相机 also leads on update cadence (every 3 days vs weekly) and iOS requirement (9.0 vs 15.6). EchoRead's advantage is device support (4 vs 2). On price and ads there is nothing between them.

Both are free to download. EchoRead sells 8 in-app purchases, starting at $4.99 per month. 极相机 asks for nothing beyond the download.

极相机 ships an update every 3 days, EchoRead weekly. The most recent releases landed on October 6, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 极相机 | EchoRead |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/echoread-ai-reading-notes/id6740475635/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Weekly |
| Monetization | — | Freemium |
| Size | 5 MB | 68 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [ABV Mobile](https://appshunter.io/developer/595885253) | [Wei Lai Zhi Tu Tech Inc](https://appshunter.io/developer/1688154558) |

## What reviewers say

### 极相机

[App page](https://appshunter.io/ios/app/id1525322135)

**Features:** macOS Compatibility

**In-app purchases:** none


### EchoRead

[App page](https://appshunter.io/ios/app/echoread-ai-reading-notes/id6740475635)

This app transforms reading highlights into visual mind maps and uses AI with the Feynman learning method to deepen understanding. It helps organize notes from various sources, connect ideas, and create personalized learning experiences like reading podcasts and summaries.

**Highlights:** Convert highlights to mind maps, AI-powered Q&A and note linking, Automatic idea connections, Feynman learning modes, Generate reading podcasts, Create structured summaries, Card notes with cross-linking

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Membership | $4.99 | per month |
| 1 Month Pro Member | $8.99 | per month |
| 3 Month Membership | $12.99 | per 3 months |
| 3 Month Pro Membership | $25.99 | per 3 months |
| 1 Year Memebership | $49.99 | per year |
| 1 year Pro Member | $89.99 | per year |
| Quota package | $2.99 | one-time |
| 100 Import Quota | $8.99 | one-time |


## Frequently asked questions

### Is 极相机 free?

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

### Is EchoRead free?

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

### Do 极相机 or EchoRead have ads?

Neither 极相机 nor EchoRead shows ads.

### Which is updated more often, 极相机 or EchoRead?

极相机 ships an update every 3 days, and EchoRead weekly. Most recently, 极相机 was updated on October 6, 2026 and EchoRead on October 24, 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.*