# 火星教练 vs 顽皮鸭

The clearest difference is in-app purchases: 火星教练 at none against 顽皮鸭's 10. 火星教练 also leads on device support and iOS requirement (9.0 vs 11.0). On price there is nothing between them.

Both are free to download. 顽皮鸭 sells 10 one-off in-app purchases. 火星教练 asks for nothing beyond the download.

## The numbers

| Metric | 火星教练 | 顽皮鸭 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | — |
| Update frequency | Every 3 weeks | — |
| Size | 21 MB | 341 MB |
| Requires iOS | **9.0** | 11.0 |
| Devices | **iPhone, iPod** | — |
| Age rating | 4+ | 17+ |
| Developer | [苏州卡炊宁网络科技有限公司](https://appshunter.io/developer/1381332440) | [Hainan Mengyin Network technology Co., LTD](https://appshunter.io/developer/1741726638) |

## What reviewers say

### 火星教练

[App page](https://appshunter.io/ios/app/id1270142410)

**In-app purchases:** none


### 顽皮鸭

[App page](https://appshunter.io/ios/app/id6498707089)

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 420蓝钻 | $0.99 | one-time |
| 1260蓝钻 | $2.99 | one-time |
| 月度会员 | $3.99 | one-time |
| 季度会员 | $8.99 | one-time |
| 6860蓝钻 | $14.99 | one-time |
| 半年度会员 | $19.99 | one-time |
| 11760蓝钻 | $24.99 | one-time |
| 18760蓝钻 | $39.99 | one-time |
| 年度会员 | $39.99 | one-time |
| 27860蓝钻 | $59.99 | one-time |


## Frequently asked questions

### Is 火星教练 free?

火星教练 is free to download, with no in-app purchases.

### Is 顽皮鸭 free?

顽皮鸭 is free to download, with in-app purchases available.

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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.*