# 全能错题本 vs 光合动力

The clearest difference is in-app purchases: 全能错题本 at none against 光合动力's 2. 全能错题本 also leads on iOS requirement (12.0 vs 16.6). On price, ads and device support there is nothing between them.

Both are free to download. 光合动力 sells 2 in-app purchases, starting at $1.99 per month. 全能错题本 asks for nothing beyond the download.

## The numbers

| Metric | 全能错题本 | 光合动力 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | — |
| Size | 95 MB | 11 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [丽丽 李](https://appshunter.io/developer/1610077348) | [贝贝 尚](https://appshunter.io/developer/1735265297) |

## What reviewers say

### 全能错题本

[App page](https://appshunter.io/ios/app/id1670314053)

**Features:** macOS Compatibility

**In-app purchases:** none


### 光合动力

[App page](https://appshunter.io/ios/app/id6761237684)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 连续包月 | $1.99 | per month |
| 连续包年 | $14.99 | per year |


## Frequently asked questions

### Is 全能错题本 free?

全能错题本 is free to download, with no in-app purchases.

### Is 光合动力 free?

光合动力 is free to download, with in-app purchases available.

### Do 全能错题本 or 光合动力 have ads?

Neither 全能错题本 nor 光合动力 shows ads.

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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.*