# Mark Done vs 21天计划

The clearest difference is in-app purchases: 21天计划 at none against Mark Done's 2. 21天计划 also leads on iOS requirement (12.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. Mark Done sells 2 in-app purchases, starting at $0.99 per month. 21天计划 asks for nothing beyond the download.

## The numbers

| Metric | Mark Done | 21天计划 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 11 days | — |
| Size | 29 MB | 42 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [之泉 夏](https://appshunter.io/developer/1541453172) | [红升 孙](https://appshunter.io/developer/1502418960) |

## What reviewers say

### Mark Done

[App page](https://appshunter.io/ios/app/mark-done/id6740075243)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 连续包月 | $0.99 | per month |
| 连续包年 | $5.99 | per year |


### 21天计划

[App page](https://appshunter.io/ios/app/21/id6754164973)

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

**In-app purchases:** none


## Frequently asked questions

### Is Mark Done free?

Mark Done is free to download, with in-app purchases available.

### Is 21天计划 free?

21天计划 is free to download, with no in-app purchases.

### Do Mark Done or 21天计划 have ads?

Neither Mark Done nor 21天计划 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.*