# WX Assistant vs cella

The clearest difference is in-app purchases: WX Assistant at none against cella's 1. WX Assistant also leads on iOS requirement (14.0 vs 17.0). cella's advantage is update cadence (every 10 days vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. cella sells 1 one-off in-app purchase. WX Assistant asks for nothing beyond the download.

WX Assistant ships an update monthly, cella every 10 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | WX Assistant | cella |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cella-crystal-viewer/id6790140743/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 10 days** |
| Monetization | — | Freemium |
| Size | 35 MB | 71 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [北京文香信息技术有限公司](https://appshunter.io/developer/1034699967) | [武汉回到未来科技有限公司](https://appshunter.io/developer/1891400712) |

## What reviewers say

### WX Assistant

[App page](https://appshunter.io/ios/app/wx-assistant/id6636468415)

**Features:** macOS Compatibility

**In-app purchases:** none


### cella

[App page](https://appshunter.io/ios/app/cella-crystal-viewer/id6790140743)

Explore crystal structures in interactive 3D. Visualize atomic arrangements, view different molecular models, and access a curated atlas of common materials. Supports CIF file import and export with a one-time purchase.

**Highlights:** Interactive 3D crystal exploration, Fifteen visual Cell Notes, Curated structure atlas, Multiple view modes (ball-and-stick, space-filling), Unit cell and (hkl) plane visualization, CIF file import and export (Pro), No ads, tracking, or analytics

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| cella Pro | $5.99 | one-time |


## Frequently asked questions

### Is WX Assistant free?

WX Assistant is free to download, with no in-app purchases.

### Is cella free?

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

### Do WX Assistant or cella have ads?

Neither WX Assistant nor cella shows ads.

### Which is updated more often, WX Assistant or cella?

WX Assistant ships an update monthly, and cella every 10 days. Most recently, WX Assistant was updated on November 4, 2026 and cella on October 31, 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.*