# 圖書館大冒險 vs I

The clearest difference is device support: I at 3 against 圖書館大冒險's —. 圖書館大冒險's advantage is iOS requirement (11.0 vs 15.0). On price 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.

## The numbers

| Metric | 圖書館大冒險 | I |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | — | Fortnightly |
| Size | 1.3 GB | 1.5 GB |
| Requires iOS | **11.0** | 15.0 |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Itchi Technology Limited](https://appshunter.io/developer/1456708978) | [Xiuli Tong](https://appshunter.io/developer/1702124968) |

## What reviewers say

### 圖書館大冒險

[App page](https://appshunter.io/ios/app/id1541593334)

**In-app purchases:** none


### I

[App page](https://appshunter.io/ios/app/i-did/id1643640330)

**In-app purchases:** none


## Frequently asked questions

### Is 圖書館大冒險 free?

圖書館大冒險 is free to download, with no in-app purchases.

### Is I free?

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

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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.*