I recently saw an app (Android only) that apparently is capable of setting your phone to grayscale, with the exception of certain apps. Unfortunately I can't f

I recently saw an app (Android only) that apparently is capable of setting your phone to grayscale, with the exception of certain apps. Unfortunately I can't find it anymore. I've been trying hard. I too would love to live on a black and white phone with certain exceptions (in my case mainly camera and maps). If anyone knows/remembers this app, you'd make my day :)