# WonderPen vs 亿方圆

The clearest difference is in-app purchases: 亿方圆 at none against WonderPen's 2. 亿方圆 also leads on iOS requirement (13.0 vs 17.0). WonderPen's advantage is update cadence (fortnightly vs every 10 months) and device support. On price there is nothing between them.

Both are free to download. WonderPen sells 2 in-app purchases, starting at $2.99 per month. 亿方圆 asks for nothing beyond the download.

WonderPen ships an update fortnightly, 亿方圆 every 10 months. Both last shipped on November 4, 2026.

## The numbers

| Metric | WonderPen | 亿方圆 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (9 ratings)](https://appshunter.io/ios/app/wonderpen/id6476477820/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 61.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | **Fortnightly** | Every 10 months |
| Monetization | Freemium | — |
| Size | 54 MB | 65 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | **iPhone, iPad, Mac** | — |
| Age rating | 17+ | 17+ |
| Developer | [Hangzhou Tongming Technology Company Limited](https://appshunter.io/developer/1173437103) | [新芳 郑](https://appshunter.io/developer/1727598929) |

## What reviewers say

### WonderPen

[App page](https://appshunter.io/ios/app/wonderpen/id6476477820)

This writing application offers a streamlined experience for authors, students, and enthusiasts. It features a hierarchical document structure, integrated notes, and flexible export options. Personalize your writing environment with customizable themes and formatting.

**Highlights:** Tree-like directory for long documents, Dedicated memos per document, Global card list for reference, One-click typesetting, Plain text and Markdown export, Light/night modes and custom backgrounds, Local and cloud snapshots for data security

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro+ monthly membership | $2.99 | per month |
| Pro+ annual membership | $19.99 | per year |


### 亿方圆

[App page](https://appshunter.io/ios/app/id6478103930)

**In-app purchases:** none


## Frequently asked questions

### Is WonderPen free?

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

### Is 亿方圆 free?

亿方圆 is free to download, with no in-app purchases.

### Which is updated more often, WonderPen or 亿方圆?

WonderPen ships an update fortnightly, and 亿方圆 every 10 months. Most recently, WonderPen was updated on November 4, 2026 and 亿方圆 on November 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.*