# 读万卷 vs IBI

The clearest difference is device support: 读万卷 at 4 against IBI's 2. 读万卷 also leads on iOS requirement (13.0 vs 15.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

读万卷 ships an update every 5 weeks, IBI monthly. The most recent releases landed on September 12, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | 读万卷 | IBI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Monthly** |
| Size | 190 MB | 29 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [强 闫](https://appshunter.io/developer/1653509757) | [Biuged Precise Instruments (Guangzhou) Co., Ltd.](https://appshunter.io/developer/6784089182) |

## What reviewers say

### 读万卷

[App page](https://appshunter.io/ios/app/id6557038541)

**In-app purchases:** none


### IBI

[App page](https://appshunter.io/ios/app/ibi/id6784089180)

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

**In-app purchases:** none


## Frequently asked questions

### Is 读万卷 free?

读万卷 is free to download, with no in-app purchases.

### Is IBI free?

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

### Do 读万卷 or IBI have ads?

Neither 读万卷 nor IBI shows ads.

### Which is updated more often, 读万卷 or IBI?

读万卷 ships an update every 5 weeks, and IBI monthly. Most recently, 读万卷 was updated on September 12, 2026 and IBI on September 7, 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.*