# NAS文件传输 vs Chromaticity Assistant

The clearest difference is in-app purchases: Chromaticity Assistant at none against NAS文件传输's 1. NAS文件传输's advantage is update cadence (weekly vs every 5 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. NAS文件传输 sells 1 one-off in-app purchase. Chromaticity Assistant asks for nothing beyond the download.

NAS文件传输 ships an update weekly, Chromaticity Assistant every 5 months. The most recent releases landed on September 17, 2026 and August 23, 2026 respectively.

## The numbers

| Metric | NAS文件传输 | Chromaticity Assistant |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/chromaticity-assistant/id6504816355/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 5 months |
| Monetization | — | Free |
| Size | 29 MB | 3 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPod, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Wuhan Zhiya Technology Co., Ltd.](https://appshunter.io/developer/1627147500) | [克俊 张](https://appshunter.io/developer/1168250350) |

## What reviewers say

### NAS文件传输

[App page](https://appshunter.io/ios/app/nas/id6450312930)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 赞助一下 | $0.99 | one-time |


### Chromaticity Assistant

[App page](https://appshunter.io/ios/app/chromaticity-assistant/id6504816355)

This app provides color management and analysis tools. It supports color space conversion, spectral analysis of visible light, and color gamut analysis for various standards.

**Highlights:** Color space conversion (RGB, CMYK, HSV, LAB, HEX), Spectral analysis (CIE-1931, CIE-1976), Color gamut analysis (DCI-P3, NTSC, sRGB, Adobe RGB), Import optical spectrum data (CSV), Import primary color coordinates (CSV)

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

**In-app purchases:** none


## Frequently asked questions

### Is NAS文件传输 free?

NAS文件传输 is free to download, with in-app purchases available.

### Is Chromaticity Assistant free?

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

### Do NAS文件传输 or Chromaticity Assistant have ads?

Neither NAS文件传输 nor Chromaticity Assistant shows ads.

### Which is updated more often, NAS文件传输 or Chromaticity Assistant?

NAS文件传输 ships an update weekly, and Chromaticity Assistant every 5 months. Most recently, NAS文件传输 was updated on September 17, 2026 and Chromaticity Assistant on August 23, 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.*