# Best Proportion Calc vs Chromaticity Assistant

The clearest difference is ads: Chromaticity Assistant at none against Best Proportion Calc's shown. Chromaticity Assistant also leads on monetization model (free vs ad-supported). Best Proportion Calc's advantage is update cadence (every 2 months vs every 5 months) and ratings volume (4 vs 1). On price, rating, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Best Proportion Calc against 5.0 for Chromaticity Assistant. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Best Proportion Calc ships an update every 2 months, Chromaticity Assistant every 5 months. The most recent releases landed on September 13, 2026 and August 23, 2026 respectively.

## The numbers

| Metric | Best Proportion Calc | Chromaticity Assistant |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (4 ratings)](https://appshunter.io/ios/app/best-proportion-calc/id6474536406/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/chromaticity-assistant/id6504816355/reviews) |
| Number of ratings | **4** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Ad-supported | **Free** |
| Size | 4 MB | 3 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Denis Belmont](https://appshunter.io/developer/1174113984) | [克俊 张](https://appshunter.io/developer/1168250350) |

## What reviewers say

### Best Proportion Calc

[App page](https://appshunter.io/ios/app/best-proportion-calc/id6474536406)

Easily solve proportion problems with a simple and intuitive interface. This app uses the cross product method for quick and accurate calculations across various fields like finance and science. It's available offline and free to use.

**Highlights:** Intuitive proportion calculation, Cross product method for solving equations, Versatile for finance, science, and more, Offline functionality, Free to use

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Best Proportion Calc free?

Best Proportion Calc is free to download, with no in-app purchases.

### Is Chromaticity Assistant free?

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

### Which has better reviews, Best Proportion Calc or Chromaticity Assistant?

Best Proportion Calc and Chromaticity Assistant are both rated 5.0 out of 5 on the App Store, from 4 and 1 ratings respectively.

### Do Best Proportion Calc or Chromaticity Assistant have ads?

Best Proportion Calc shows ads; Chromaticity Assistant does not.

### Which is updated more often, Best Proportion Calc or Chromaticity Assistant?

Best Proportion Calc ships an update every 2 months, and Chromaticity Assistant every 5 months. Most recently, Best Proportion Calc was updated on September 13, 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.*