# ZBform vs 错题本

ZBform and 错题本 are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | ZBform | 错题本 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Size | 13 MB | 13 MB |
| Requires iOS | **12.0** | 13 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zettabyte Information Technology Co.,Ltd.](https://appshunter.io/developer/1568041612) | [媛媛 钱](https://appshunter.io/developer/1869024065) |

## What reviewers say

### ZBform

[App page](https://appshunter.io/ios/app/zbform/id1568041610)

**Features:** macOS Compatibility

**In-app purchases:** none


### 错题本

[App page](https://appshunter.io/ios/app/id6793146293)

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

**In-app purchases:** none


## Frequently asked questions

### Is ZBform free?

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

### Is 错题本 free?

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

### Do ZBform or 错题本 have ads?

Neither ZBform nor 错题本 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.*