# 化學之書 vs 探索中文+

The clearest difference is price: 化學之書 at Free against 探索中文+'s $0.99. 化學之書 also leads on update cadence (every 3 weeks vs every 3 months) and iOS requirement (17.0 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

化學之書 is free to download; 探索中文+ costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

化學之書 ships an update every 3 weeks, 探索中文+ every 3 months. The most recent releases landed on October 13, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | 化學之書 | 探索中文+ |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Size | 55 MB | 5 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [BUDDHIST HO NAM KAM COLLEGE](https://appshunter.io/developer/1532349038) | [Kai Hin Tsoi](https://appshunter.io/developer/1618879551) |

## What reviewers say

### 化學之書

[App page](https://appshunter.io/ios/app/id1512573867)

**Features:** Vision Pro support

**In-app purchases:** none


### 探索中文+

[App page](https://appshunter.io/ios/app/plus/id6444897972)

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

**In-app purchases:** none


## Frequently asked questions

### Is 化學之書 free?

化學之書 is free to download, with no in-app purchases.

### Is 探索中文+ free?

探索中文+ costs $0.99, with no in-app purchases.

### Do 化學之書 or 探索中文+ have ads?

Neither 化學之書 nor 探索中文+ shows ads.

### Which is updated more often, 化學之書 or 探索中文+?

化學之書 ships an update every 3 weeks, and 探索中文+ every 3 months. Most recently, 化學之書 was updated on October 13, 2026 and 探索中文+ on October 4, 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.*