# WhyOpen vs 暖暖阅读器

The clearest difference is in-app purchases: 暖暖阅读器 at none against WhyOpen's 2. WhyOpen's advantage is iOS requirement (16.6 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. WhyOpen sells 2 in-app purchases, starting at $2.99 per month. 暖暖阅读器 asks for nothing beyond the download.

WhyOpen ships an update every 6 days, 暖暖阅读器 every 9 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | WhyOpen | 暖暖阅读器 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 9 days |
| Size | 52 MB | 8 MB |
| Requires iOS | **16.6** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Hilmican Celiker](https://appshunter.io/developer/1847464941) | [瑞超 贺](https://appshunter.io/developer/1882916319) |

## What reviewers say

### WhyOpen

[App page](https://appshunter.io/ios/app/whyopen-screen-time/id6768672558)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Yearly | $14.99 | per year |


### 暖暖阅读器

[App page](https://appshunter.io/ios/app/id6790091625)

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

**In-app purchases:** none


## Frequently asked questions

### Is WhyOpen free?

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

### Is 暖暖阅读器 free?

暖暖阅读器 is free to download, with no in-app purchases.

### Do WhyOpen or 暖暖阅读器 have ads?

Neither WhyOpen nor 暖暖阅读器 shows ads.

### Which is updated more often, WhyOpen or 暖暖阅读器?

WhyOpen ships an update every 6 days, and 暖暖阅读器 every 9 days. Most recently, WhyOpen was updated on October 31, 2026 and 暖暖阅读器 on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*