# 极限库 vs Catch Up

The clearest difference is update cadence: Catch Up at every 4 days against 极限库's monthly. Catch Up also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

极限库 ships an update monthly, Catch Up every 4 days. Both last shipped on October 30, 2026.

## The numbers

| Metric | 极限库 | Catch Up |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 days** |
| Size | 72 MB | 73 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [增霖 石](https://appshunter.io/developer/1595522023) | [Coupon Crush Ltd.](https://appshunter.io/developer/1697098484) |

## What reviewers say

### 极限库

[App page](https://appshunter.io/ios/app/10000-plus/id1595553813)

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

**In-app purchases:** none


### Catch Up

[App page](https://appshunter.io/ios/app/catch-up/id6738236344)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 极限库 free?

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

### Is Catch Up free?

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

### Do 极限库 or Catch Up have ads?

Neither 极限库 nor Catch Up shows ads.

### Which is updated more often, 极限库 or Catch Up?

极限库 ships an update monthly, and Catch Up every 4 days. Most recently, 极限库 was updated on October 30, 2026 and Catch Up 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.*