# When · Days That Matter vs 发票打印合并器

The clearest difference is in-app purchases: 发票打印合并器 at none against When · Days That Matter's 1. 发票打印合并器 also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price and ads there is nothing between them.

Both are free to download. When · Days That Matter sells 1 one-off in-app purchase. 发票打印合并器 asks for nothing beyond the download.

## The numbers

| Metric | When · Days That Matter | 发票打印合并器 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Size | 6 MB | 66 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [杰龙 刘](https://appshunter.io/developer/1481214183) | [Changsha Quickwis Network Technology Co., Ltd.](https://appshunter.io/developer/931176045) |

## What reviewers say

### When · Days That Matter

[App page](https://appshunter.io/ios/app/when-days-that-matter/id1616365331)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| When Premium · Lifetime Access | $0.99 | one-time |


### 发票打印合并器

[App page](https://appshunter.io/ios/app/id6746323744)

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

**In-app purchases:** none


## Frequently asked questions

### Is When · Days That Matter free?

When · Days That Matter is free to download, with in-app purchases available.

### Is 发票打印合并器 free?

发票打印合并器 is free to download, with no in-app purchases.

### Do When · Days That Matter or 发票打印合并器 have ads?

Neither When · Days That Matter nor 发票打印合并器 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.*