# 科思創數位通行證 vs Water Purifier Diary

The clearest difference is in-app purchases: 科思創數位通行證 at none against Water Purifier Diary's 2. 科思創數位通行證 also leads on ads (none vs shown). Water Purifier Diary's advantage is update cadence (every 3 weeks vs every 2 months) and iOS requirement (13.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. Water Purifier Diary sells 2 in-app purchases, starting at $0.99 per month. 科思創數位通行證 asks for nothing beyond the download.

科思創數位通行證 ships an update every 2 months, Water Purifier Diary every 3 weeks. The most recent releases landed on September 11, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | 科思創數位通行證 | Water Purifier Diary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 98 MB | 41 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [台灣科思創股份有限公司](https://appshunter.io/developer/1464490278) | [HAO CHANG KUO](https://appshunter.io/developer/1735524069) |

## What reviewers say

### 科思創數位通行證

[App page](https://appshunter.io/ios/app/id6478649940)

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

**In-app purchases:** none


### Water Purifier Diary

[App page](https://appshunter.io/ios/app/water-purifier-diary/id6761051602)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro (Monthly) | $0.99 | per month |
| Pro (Yearly) | $8.99 | per year |


## Frequently asked questions

### Is 科思創數位通行證 free?

科思創數位通行證 is free to download, with no in-app purchases.

### Is Water Purifier Diary free?

Water Purifier Diary is free to download, with in-app purchases available.

### Do 科思創數位通行證 or Water Purifier Diary have ads?

Water Purifier Diary shows ads; 科思創數位通行證 does not.

### Which is updated more often, 科思創數位通行證 or Water Purifier Diary?

科思創數位通行證 ships an update every 2 months, and Water Purifier Diary every 3 weeks. Most recently, 科思創數位通行證 was updated on September 11, 2026 and Water Purifier Diary on September 20, 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.*