I have a 6-year-old with protanopia and after a frustrating experience with a board game that we had to take a Sharpie to to make it useable to him, I stumbled across a forum that sent me to your app.This. Is. Amazing! After years of trying to guess which colors were challenging to him in each context, I can literally see for myself! I spent about 20 minutes just walking around my house with my mouth agape, seeing our home -and us! -the way he does. It is rare that we can truly experience what a challenge is like for someone else -and this app did just that. (I see what he means: unripe and ripe bananas are identical!)This is going to be an incredibly helpful tool for us and I'm going to tell his teachers about this app too. Thank you for quite literally giving us a view into his world.

I am red-green colorblind and for most of my life was stuck with the game “what color is that” and “what color does that look like.” These are games that non-colorblind people play in trying to understand color blindness. What they don’t understand is that colorblind people can’t do that. They can’t see the colors the same way and don’t have a common reference point for describing the colors. When I purchased this app 4-5 years ago I was caught in a problem of picking colors to paint my house. My friend would show me paint samples that looked, to me, exactly alike and ask me which I preferred. (To her they looked quite different.) When I would say they look exactly alike, she would get upset thinking I just wasn’t interested. Then I downloaded the app and tried it out by taking a picture of the paint samples and, from the “how colorblind people see it” asked her to pick which one she liked best. Her answer “they all look the same” followed by “oh wait, when you tell me they all look the same you mean that they all look the same.” The tension of the moment went away instantly. Since then, this story has repeated itself more times than I can imagine. Somebody would say “look at the colors of this” and I don’t get it. So I whip out my app and say “this is what I see” and they get it right away. “Oh, you can see that the leaves have changed colors, but you can’t see all the color variation. I get it.” Besides helping me relate to others, this app has a few useful features that I use whenever I’m in a quandary about color. The “helps colorblind people distinguish colors” feature lets me quickly see “oh, I bet I’m not understanding something others see here.” It also lets me quickly figure out which shirt is purple and which is simply blue. The color ID feature then lets me zero in on particular things and get a rough idea of the color other people will say something is.So I super highly recommend this app to anybody who’s colorblind and frustrated with color-sensitive people just not getting it.

I love being able to use this app to see what my graphs will look like to my team members who can't always distinguish between colors.

I like it, though it could have simulation of partial color deficiency, maybe with a slider for how much. It might also use some “About…” text popup that explains the app and how to use it.The single-view display does not clearly show what processing is applied to that view, or how to change it. No processing is only displayed when doing color-value capture with a square at the center of the view.The multiview could also include no processing. It could display only deficiency selection, only color enhancement, or making some color white, making 4 at a time.One might also mention simulating dog vision - dogs have red-green color deficiency.