# 爱普生投影距离计算器 vs Mark Done

The clearest difference is in-app purchases: 爱普生投影距离计算器 at none against Mark Done's 2. Mark Done's advantage is update cadence (every 11 days vs every 5 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Mark Done sells 2 in-app purchases, starting at $0.99 per month. 爱普生投影距离计算器 asks for nothing beyond the download.

爱普生投影距离计算器 ships an update every 5 months, Mark Done every 11 days. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 爱普生投影距离计算器 | Mark Done |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 11 days** |
| Size | 16 MB | 29 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Epson(China) Co., Ltd](https://appshunter.io/developer/704082889) | [之泉 夏](https://appshunter.io/developer/1541453172) |

## What reviewers say

### 爱普生投影距离计算器

[App page](https://appshunter.io/ios/app/id1367859852)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is 爱普生投影距离计算器 free?

爱普生投影距离计算器 is free to download, with no in-app purchases.

### Is Mark Done free?

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

### Do 爱普生投影距离计算器 or Mark Done have ads?

Neither 爱普生投影距离计算器 nor Mark Done shows ads.

### Which is updated more often, 爱普生投影距离计算器 or Mark Done?

爱普生投影距离计算器 ships an update every 5 months, and Mark Done every 11 days. Most recently, 爱普生投影距离计算器 was updated on October 26, 2026 and Mark Done on October 24, 2026.

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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.*