# 索骥 vs Read Copilot

The clearest difference is in-app purchases: 索骥 at none against Read Copilot's 2. 索骥 also leads on iOS requirement (12.0 vs 16.4). Read Copilot's advantage is update cadence (weekly vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Read Copilot sells 2 in-app purchases, starting at $2.99 per month. 索骥 asks for nothing beyond the download.

索骥 ships an update every 3 months, Read Copilot weekly. The most recent releases landed on October 25, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 索骥 | Read Copilot |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/read-copilot-ai-book-reader/id6449242676/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 14 MB | 73 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shanghai Midu Information Technology Co.,Ltd](https://appshunter.io/developer/621270166) | [晓飞 徐](https://appshunter.io/developer/1688306191) |

## What reviewers say

### 索骥

[App page](https://appshunter.io/ios/app/id1594993156)

**Features:** macOS Compatibility

**In-app purchases:** none


### Read Copilot

[App page](https://appshunter.io/ios/app/read-copilot-ai-book-reader/id6449242676)

This AI-powered reading companion helps you process ePubs, PDFs, and RSS feeds. Get instant summaries, translations, explanations, and engage in conversations with your content. Save articles for offline reading and understand more, faster.

**Highlights:** Summarize articles and chapters, Translate and explain text, Chat with content for contextual answers, Read ePub, PDF, and RSS feeds, Save articles for offline reading

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Annual | $29.99 | per year |


## Frequently asked questions

### Is 索骥 free?

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

### Is Read Copilot free?

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

### Do 索骥 or Read Copilot have ads?

Neither 索骥 nor Read Copilot shows ads.

### Which is updated more often, 索骥 or Read Copilot?

索骥 ships an update every 3 months, and Read Copilot weekly. Most recently, 索骥 was updated on October 25, 2026 and Read Copilot 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.*