Chromatic Vision Simulator

"Chromatic Vision Simulator" is an experience tool which simulates color vision of color vision deficiencies.
This software makes and shows you a simulated image from built-in camera or image file in real-time.

Features

• Shows you how people with a specific type of color vision deficiency (dichromat) see the world.
• Supports "Normal Color Vision," "Protanope," "Deuteranope" and "Tritanope" color deficient types.
• Lineups both versions for iOS devices and android devices. The iOS version is compatible with Apple iPhone and iPad, and the Android version is worked on various Android devices. You can bring it always with you and check out colors at anywhere.
• Recommended for people who treat colors carefully, such as artists, designers, etc.
• Developed by Kazunori Asada (Ph.D. Medical Science and Media Design) based on the research in color science.

What's New

• 2026/10/30: Version 4.0 is released.
  New "Difference mode": shows, as brightness, how much the colors change between the original image and the simulated image of each color vision type (the distance in the Oklab color space). Swipe left or right with two fingers on the screen, or with one finger on the bottom bar, to switch between it and the conventional "Appearance mode".
  New "Show Color Name": shows the name of the color (systematic and traditional color names), CIELAB, Oklab, Munsell and more at the place you point at with the color cursor.
  A settings screen is added (text on saved images, save on volume button, save sound, color space and more). Wide color gamut (Display P3) is supported. Capturing the camera image in P3 is supported on iOS first.
  New button icons. The iOS and Android versions now share the same screens and behavior. Works with TalkBack and VoiceOver.
  The manual is renewed, and a new "Theory" page is added.
  See the Version 4.0 announcement for details.
• 2025/09/08: Android Version 3.3.0 is released.
  Fixed a bug where the save button would stop working again on Android 15 and later. Supported OS changes (Edge to Edge, 16K memory page).
• 2024/07/02: iOS Version 2.43 was released
  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.
• 2024/02/28: Android Version 3.22 was released.
  Fixed a bug that the Save button did not work on Android 14.
• 2023/10/08: Android Version 3.21 was released.
  Supports Android 14.
• 2021/01/27: iOS Version 2.41 was released.
  Compatible with various high resolution models and supports the latest iOS.
• 2019/08/24: Android Version 3.1 was released.
  Supports EXIF rotation tag when read image files.
• 2018/08/11: Announcement:
  The "Chromatic Vision Simulator" has been made Open-Source and the "Chromatic Vision Simulator Android Version 3.0" has been released.
• 2017/12/08: iOS Version 2.31 was released.
  Fixed a bug that crashes immediately after displaying splash when used with iOS 9 or lower.
• 2017/12/06: iOS Version 2.3 was released.
  Supports iPhone X screen size.
• 2015/06/26: iOS Version 2.2 was released.
  iOS8, iPhone 6 and iPhone 6 Plus are fully supported.
• 2013/09/25: iOS Version 2.11 was released.
  Fixed issue with layout which is confused on iOS7.
• 2013/09/10: iOS Version 2.1 was released.
  Simulating image files in the "Photo Album" and "Simulation Intensity" are supported.
• 2012/10/06: iOS Version 2.02 was released.
  Corresponds to the longwise screen of iPhone 5 and fixed a bug of saving the screen in iOS6.
• 2012/09/07: Web Edition was released.
  The web edition which works on a web browser without installing software was released. A web browser which supports WebGL is required. The web camera only works when WebRTC is supported.
  As of today(2013/06/05), it works on Google Chrome, Firefox and Opera. Safari can be used with only file mode if WebGL is enabled from the "Develop" menu (it is not enabled as the default).
• 2012/06/05: Android Version 2.03 was released.
  Fixed the bug of black screen on some Android 4.0 devices.
  (If camera previews are displayed doubly, turn off the "Black screen hack" option in preferences. (panasonic P-07C etc.))
• 2011/12/16: Android version 2.02 was released.
• 2011/08/03: Android version 2.01 was released.
• 2011/07/25: Android version was released.
• 2011/07/19: iOS version 2.01 was released.
• 2011/07/02: iOS version 2.0 was released.
• 2010/08/31: iOS version 1.0 was released.