# 预约计划 vs AI背单词

The clearest difference is device support: AI背单词 at 2 against 预约计划's —. On price, in-app purchases and iOS requirement 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 | 预约计划 | AI背单词 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | — | Every 2 months |
| Size | 0 MB | 10 MB |
| Requires iOS | 14.2 | **13.0** |
| Devices | — | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [孝栋 张](https://appshunter.io/developer/1650705364) | [Chengdu Yuyue Tansuo Technology Co., Ltd.](https://appshunter.io/developer/1732674059) |

## What reviewers say

### 预约计划

[App page](https://appshunter.io/ios/app/id6443932989)

**In-app purchases:** none


### AI背单词

[App page](https://appshunter.io/ios/app/ai/id6478390098)

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

**In-app purchases:** none


## Frequently asked questions

### Is 预约计划 free?

预约计划 is free to download, with no in-app purchases.

### Is AI背单词 free?

AI背单词 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.*