# Chromatic Vision Simulator

> Color vision deficiency simulator for understanding different perception types. (iPhone/iPad app by Kazunori Asada.)

- Source: https://appshunter.io/ios/app/chromatic-vision-simulator/id389310222 (this page in markdown: same URL + `.md`)
- Developer: [Kazunori Asada](https://appshunter.io/developer/388924061)
- Category: Education, Utilities
- Price: Free
- Rating: 4.40/5 from 58 App Store ratings · 93 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 6 MB
- Languages: American English, Japanese, Korean, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2010-08-31
- Data updated: 2026-08-17
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/chromatic-vision-simulator/id389310222/reviews.md

## What is Chromatic Vision Simulator?

“Chromatic Vision Simulator” is a color vision simulation tool which simulates the color vision of color vision deficiencies. This software is developed by Kazunori Asada (Ph.D. medical science and Ph.D. media design), based on the research in color science.

About 5% of men have difficulty distinguishing red and green, or recognizing dark red. Such color deficiency can be classified into three major categories: protanope / Protanomal, Deuteranope / Deuteranomal and Tritanope / Tritanomal.

Color deficiencies are the inability to tell differences between some colors other people can easily distinguish. People with different types of color vision deficiency perceive colors differently. For example, individuals diagnosed as Protan or Deutan cannot perceive differences between red and green, and pink and cyan.

These color visions are predictable by calculating working of the cone cells that perceives the color to some degree.

"Chromatic Vision Simulator" makes simulated images of each color vision type from built-in Camera or Photos and shows you how people with specific types of color vision sees the world in real-time.

## Key features

- Simulates color vision deficiencies
- Real-time camera simulation
- Photo simulation
- Supports protanope/protanomal
- Supports deuteranope/deuteranomal
- Supports tritanope/tritanomal

## Recent user reviews (10 of 93)

All indexed reviews: https://appshunter.io/ios/app/chromatic-vision-simulator/id389310222/reviews.md

### 3/5 — Kind of works

*2026-07-10*

If you know a bit about color blindness. You know it’s some cones of color perception overlap. But I feel like the app just assumes the entire wavelength the cones pick up overlap based on which colorblind type you pick. So my mom just assumes all reds I see are brown but I’ve never mixed up a red and brown in my life. It’s good for picking up girls tho

### 5/5 — fun to show others

*2026-06-07*

as someone who’s colorblind, i get the question “what color is this? what do you see?” a lot. Whenever this question gets brought up i just show them this app and let them look around. The reactions are always fun and it’s always interesting to hear what they have to say. It’s really helpful understanding what i’m missing out as well. The reactions from other people tells me that i see the world in very dull colors.

### 5/5 — Please add a video function

*2026-04-18*

I’ve been using this app for about a year now to help people understand colorblindness and it is so much easier and more effective than trying to tell people verbally what the world looks like to me. I really think the cherry on top of this app would be to add a function where we could export videos using the colorblind filters, as I have not been able to find any other application that provides that feature.

### 5/5 — サイコーです

*2025-05-28*

毎日使ってます！！

### 5/5 — Amazing easy accessibility tool

*2025-05-18*

So many over-complicated colorblind simulators out there but this one outperforms them all. It’s simple and no frills, has three colorblind type variations, and the combo of camera and photo library options means I can basically test anything I need to when it comes to color accessibility. This tool is a godsend for anyone working in digital compliance!

### 5/5 — 素晴らしいアプリ

*2025-03-04*

色のデザインを検討するときに使わせて頂いています。使い方も分かりやすいです。ありがとうございます😊

### 5/5 — I love this app

*2025-01-20*

My dad is color blind and I love being able ask him on his opinion and showing him what we see or the way we see things is absolutely fantastic!

### 5/5 — 作った方は神様か？

*2024-10-23*

子どもが色覚異常です。
分かった時は心がえぐられるようなショックでした。子ども自身もとてもショックだったようです。
しかし、私がこのアプリと出会い、色覚異常の説明写真などでは表せない、光による色の輝きなども感じ取れて見えたことで、綺麗な息子の色の世界を知りました。
「あなたの色の世界も、統一感があってロマンチックな、とても素敵な色の世界ね」と言った時の、息子の満足そうな顔は一生忘れません。
感謝し尽くせないほどの感謝です。
私たちの心を前向きにして下さり、
ありがとうございます。

### 5/5 — 色弱者用のモードは実装できませんか？

*2024-08-19*

こんにちは。NHKの番組からこのアプリを知りました。
大変良いアプリでした。
いきなり要望で心苦しいのですが
「健常者が色弱者の見え方を体験する」
ではなく
「色弱者が健常者の見え方を体験する」
こっちのモードを実装出来ませんでしょうか？
私も色弱者ですが、自分が作った物や選んだ色が健常者にはどう見えているのか確認する術がありません
このアプリでその機能が備わっていれば色弱者からも有用なアプリになると思うのですが
いかがでしょうか
何卒ご一考頂ければ幸いです

**Developer response:** 「色のめがね」というアプリがあります。そちらが「色のシミュレータ」より先に作ったアプリです。よろしければ使ってみてください。

### 5/5 — 素晴らしいです

*2024-08-19*

教員です。 NHKの番組を見てこのアプリにたどり着きました。学校では、黒板の色が判別しにくい色覚の生徒のため、最近は蛍光チョークを用いているのですが、実際にはどんな風に見えているのかとても気になっていたので、百聞は一見に如かずで、ストンと落ちました。

不便な点がないように配慮していきたいと思ったのと同時に、これもまた、美しい世界だと気付きました。開発してくださり、ありがとうございます。

## Frequently asked questions about Chromatic Vision Simulator

### What does the Chromatic Vision Simulator app do?

This app simulates the color vision of individuals with various color vision deficiencies. It allows you to see how people with conditions like protanopia, deuteranopia, or tritanopia perceive colors, using either your device's live camera feed or existing photos.

### What types of color vision deficiencies can this app simulate?

The app simulates three major categories of color vision deficiencies: protanope/protanomal (red-green deficiency), deuteranope/deuteranomal (red-green deficiency), and tritanope/tritanomal (blue-yellow deficiency).

### Is this app free to use?

Yes, the Chromatic Vision Simulator app is available for free. It does not feature in-app purchases or advertisements.

### Who would benefit from using this app?

This app is beneficial for individuals who want to understand color vision deficiencies better. This includes people with color blindness themselves, their friends and family, educators, designers, and anyone interested in the science of color perception.

### How does the app simulate color vision?

The simulation is based on research in color science and calculates how cone cells, responsible for color perception, would function with different types of color vision deficiencies. This allows for a predictable visualization of how colors are perceived differently.

## Version history (last 5 releases)

### 2.43 — 2024-07-02

Fixed a bug that caused the screen to shift when launching the app in landscape orientation on an iPad. Changed the color of the toolbar when in dark mode.

### 2.42 — 2022-09-23

Fixed a bug that the camera image rotates in landscape orientation on iOS16.

### 2.41 — 2021-01-26

Fixed a bug that the ”Color vision selection buttons" becomes smaller when rotating on some models.

### 2.4 — 2021-01-25

Supports various screen sizes. Compatible with the latest iOS.

### 2.31 — 2017-12-08

Fixed a bug that crashes immediately after displaying splash when used with iOS 9 or lower.

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## More apps by Kazunori Asada

- [Chromatic Glass](https://appshunter.io/ios/app/chromatic-glass/id388924058)
- [Brighter and Bigger](https://appshunter.io/ios/app/brighter-and-bigger/id452483657)

All apps by Kazunori Asada: https://appshunter.io/developer/388924061

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-17.*