# Atomus 3D vs 字习 Pro

The clearest difference is update cadence: 字习 Pro at weekly against Atomus 3D's every 6 months. 字习 Pro also leads on price ($1.99 vs $3.99) and iOS requirement (12.0 vs 15.6). Atomus 3D's advantage is ratings volume (27 vs 6). On rating, review sentiment, ads and in-app purchases there is nothing between them.

Atomus 3D costs $3.99 and 字习 Pro $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.1 for Atomus 3D against 4.2 for 字习 Pro. Both are backed by a comparable volume of ratings — 27 and 6 respectively. Written reviews are what separate them: 65% of Atomus 3D's written reviews are positive against 60% of 字习 Pro's.

Atomus 3D ships an update every 6 months, 字习 Pro weekly. The most recent releases landed on September 11, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Atomus 3D | 字习 Pro |
| --- | --- | --- |
| Price | $3.99 | **$1.99** |
| Rating | [4.1 (27 ratings)](https://appshunter.io/ios/app/atomus-3d/id1074119248/reviews) | **[4.2 (6 ratings)](https://appshunter.io/ios/app/pro/id1507339788/reviews)** |
| Number of ratings | **27** | 6 |
| Positive reviews | **65.0% of reviews** | 60.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Weekly** |
| Monetization | Paid | Paid |
| Size | 118 MB | 42 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SungLab Inc](https://appshunter.io/developer/1691666995) | [金磊 李](https://appshunter.io/developer/1492608769) |

## What reviewers say

### Atomus 3D

[App page](https://appshunter.io/ios/app/atomus-3d/id1074119248)

This interactive visualizer offers a dynamic and artistic experience. Control a universe with multi-touch gestures, customize particle effects, and enjoy vibrant color modes. It's designed to inspire creativity and provide a visually stunning escape.

**Highlights:** Multi-touch display, Customizable particle effects, Dynamic 3D visuals, Multiple color modes, High frame rate performance

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

**In-app purchases:** none


### 字习 Pro

[App page](https://appshunter.io/ios/app/pro/id1507339788)

Experience the art of Chinese calligraphy digitally with realistic brush and rice paper simulation. This tool brings traditional writing to the modern age, allowing you to create and save your own brush calligraphy works anytime, anywhere.

**Highlights:** Realistic brush and rice paper simulation, Adjustable brush size, Undo/redo functionality, Brush flying-white simulation, Save works to photo library, Replay writing process

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Atomus 3D free?

Atomus 3D costs $3.99, with no in-app purchases.

### Is 字习 Pro free?

字习 Pro costs $1.99, with no in-app purchases.

### Which has better reviews, Atomus 3D or 字习 Pro?

字习 Pro is rated higher. Atomus 3D averages 4.1 out of 5 from 27 ratings, while 字习 Pro averages 4.2 from 6 ratings.

### Do Atomus 3D or 字习 Pro have ads?

Neither Atomus 3D nor 字习 Pro shows ads.

### Which is updated more often, Atomus 3D or 字习 Pro?

Atomus 3D ships an update every 6 months, and 字习 Pro weekly. Most recently, Atomus 3D was updated on September 11, 2026 and 字习 Pro on September 17, 2026.

---

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