# OCS云阅读 vs 思古

The clearest difference is in-app purchases: OCS云阅读 at none against 思古's 3. OCS云阅读 also leads on iOS requirement (9.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. 思古 sells 3 in-app purchases, starting at $2.99 per month. OCS云阅读 asks for nothing beyond the download.

## The numbers

| Metric | OCS云阅读 | 思古 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (4 ratings)](https://appshunter.io/ios/app/id6740050458/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 91.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Fortnightly |
| Monetization | — | Freemium |
| Size | 30 MB | 173 MB |
| Requires iOS | **9.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Luoyang Jianbiao Library Network Technology Co., Ltd.](https://appshunter.io/developer/1460554486) | [世浩 郭](https://appshunter.io/developer/1698520041) |

## What reviewers say

### OCS云阅读

[App page](https://appshunter.io/ios/app/ocs/id1532693137)

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

**In-app purchases:** none


### 思古

[App page](https://appshunter.io/ios/app/id6740050458)

Immerse yourself in classical Chinese texts with customizable layouts, fonts, and reading themes. Annotate, bookmark, and organize your library with ease, and sync across devices via iCloud. Features include a vast digital library and a unique card-based note review system.

**Highlights:** Vertical text layout, Customizable ancient fonts, Multiple reading themes, Bookmark and annotation tools, Multi-level table of contents, iCloud backup and sync, Single character lookup

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 每月 | $2.99 | per month |
| 每年 | $14.99 | per year |
| 终身 | $89.99 | one-time |


## Frequently asked questions

### Is OCS云阅读 free?

OCS云阅读 is free to download, with no in-app purchases.

### Is 思古 free?

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

### Do OCS云阅读 or 思古 have ads?

Neither OCS云阅读 nor 思古 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.*