# UD Color Checker vs First Rush Viewer

The clearest difference is ads: First Rush Viewer at none against UD Color Checker's shown. First Rush Viewer also leads on update cadence (every 2 weeks vs every 5 months). On price, in-app purchases, monetization model 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.

UD Color Checker ships an update every 5 months, First Rush Viewer every 2 weeks. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | UD Color Checker | First Rush Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/first-rush-viewer/id6765779820/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 4 MB | 2 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Takuya Kawakami](https://appshunter.io/developer/721449462) | [진규 한](https://appshunter.io/developer/1895596688) |

## What reviewers say

### UD Color Checker

[App page](https://appshunter.io/ios/app/ud-color-checker/id721449459)

Simulate various types of color vision deficiency using your camera or photo library. Easily convert images to see how they appear to individuals with common color blindness conditions.

**Highlights:** Camera image simulation, Library image simulation, Trichromat simulation, Protanope simulation, Deuteranope simulation, Tritanope simulation, Save converted images

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

**In-app purchases:** none


### First Rush Viewer

[App page](https://appshunter.io/ios/app/first-rush-viewer/id6765779820)

This free companion app allows directors, DPs, and crew to view live camera streams from a macOS application on the same network. Monitor up to four camera feeds with stream health feedback and screen recording protection.

**Highlights:** Live camera stream monitoring, Multi-camera support (up to 4), Stream health feedback, Bonjour network discovery, QR code pairing, View-only operation

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

**In-app purchases:** none


## Frequently asked questions

### Is UD Color Checker free?

UD Color Checker is free to download, with no in-app purchases.

### Is First Rush Viewer free?

First Rush Viewer is free to download, with no in-app purchases.

### Do UD Color Checker or First Rush Viewer have ads?

UD Color Checker shows ads; First Rush Viewer does not.

### Which is updated more often, UD Color Checker or First Rush Viewer?

UD Color Checker ships an update every 5 months, and First Rush Viewer every 2 weeks. Most recently, UD Color Checker was updated on October 24, 2026 and First Rush Viewer on October 28, 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.*