# 西西弗 vs ReadRelay

The clearest difference is in-app purchases: 西西弗 at none against ReadRelay's 1. 西西弗 also leads on iOS requirement (15.0 vs 26.0). ReadRelay's advantage is update cadence (every 5 days vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. ReadRelay sells 1 one-off in-app purchase. 西西弗 asks for nothing beyond the download.

西西弗 ships an update monthly, ReadRelay every 5 days. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 西西弗 | ReadRelay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (10 ratings)](https://appshunter.io/ios/app/app/id1493146022/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 96.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | Free | — |
| Size | 159 MB | 7 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [重庆西西弗网络有限公司](https://appshunter.io/developer/1500101481) | [金苹 卢](https://appshunter.io/developer/1885537846) |

## What reviewers say

### 西西弗

[App page](https://appshunter.io/ios/app/app/id1493146022)

Discover your next great read with this app from a national bookstore chain. Browse shelves virtually, find books in-store, and get personalized recommendations. Access exclusive deals and event information.

**Highlights:** Virtual store browsing, In-store book locator, AI-powered book recommendations, Exclusive pre-orders and releases, Member-exclusive discounts, Event listings and registration, Member account management

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

**In-app purchases:** none


### ReadRelay

[App page](https://appshunter.io/ios/app/readrelay/id6811293525)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReadRelay 永久会员 | $1.99 | one-time |


## Frequently asked questions

### Is 西西弗 free?

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

### Is ReadRelay free?

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

### Do 西西弗 or ReadRelay have ads?

Neither 西西弗 nor ReadRelay shows ads.

### Which is updated more often, 西西弗 or ReadRelay?

西西弗 ships an update monthly, and ReadRelay every 5 days. Most recently, 西西弗 was updated on October 26, 2026 and ReadRelay 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.*