# Atomus HD vs 字习 Pro

The clearest difference is rating: Atomus HD at 4.8 against 字习 Pro's 4.2. Atomus HD also leads on review sentiment (91% vs 60%) and ratings volume (60 vs 6). 字习 Pro's advantage is update cadence (weekly vs every 4 months) and price ($1.99 vs $3.99). On ads, in-app purchases, monetization model and device support there is nothing between them.

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

Atomus HD holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: Atomus HD has 60 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 91% of Atomus HD's written reviews are positive against 60% of 字习 Pro's.

Atomus HD ships an update every 4 months, 字习 Pro weekly. The most recent releases landed on September 22, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Atomus HD | 字习 Pro |
| --- | --- | --- |
| Price | $3.99 | **$1.99** |
| Rating | **[4.8 (60 ratings)](https://appshunter.io/ios/app/atomus-hd/id741515911/reviews)** | [4.2 (6 ratings)](https://appshunter.io/ios/app/pro/id1507339788/reviews) |
| Number of ratings | **60** | 6 |
| Positive reviews | **90.7% of reviews** | 60.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Paid | Paid |
| Best chart rank | **#199** | — |
| Size | 63 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 HD

[App page](https://appshunter.io/ios/app/atomus-hd/id741515911)

**Currently charting:** #199 Top Paid · Entertainment (US App Store)

Experience a premium kinetic universe of light and motion with dynamic, evolving particle structures. This app offers a richer, more immersive visual experience perfect for creative focus, relaxation, or quiet exploration.

**Highlights:** Evolving light and motion structures, Richer particle density and flow, Smooth 60 FPS rendering, 10-finger multi-touch support, Adjustable particle settings, Multiple color modes, Ad-free experience

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

**In-app purchases:** none

**What reviewers like**

- ✨ Visually stunning graphics
- 🧘‍♀️ Relaxing and calming experience
- 🎨 Creative and mesmerizing visuals
- 🎶 Beautiful and soothing music
- 🎮 Addictive and engaging gameplay

**What reviewers complain about**

- ⏳ Can become boring after a while
- ❓ Lack of user manual/explanations
- 🎶 Music can be repetitive
- 💸 Some users feel it's a waste of money
- 🎛️ Limited customization options

**Reported bugs**

- App crashes with 11 fingers
- Orientation issues on tablets
- Music not working
- Sound stopped working
- App freezes after opening and exiting

**Requested features**

- User manual or explanations
- Ability to customize starting points
- Option to record or save favorite settings
- Ability to take screenshots
- More music tracks/playlists


### 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 HD free?

Atomus HD 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 HD or 字习 Pro?

Atomus HD is rated higher. Atomus HD averages 4.8 out of 5 from 60 ratings, while 字习 Pro averages 4.2 from 6 ratings.

### Do Atomus HD or 字习 Pro have ads?

Neither Atomus HD nor 字习 Pro shows ads.

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

Atomus HD ships an update every 4 months, and 字习 Pro weekly. Most recently, Atomus HD was updated on September 22, 2026 and 字习 Pro on September 17, 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.*