Oh. I don’t know anything about this. Is it weird for an app to be pulled from all of these sites? Do they have a way for the original developer to take it down if they want or some kind of flagging? Does your new phone have a higher Android build, maybe the site checks somehow to match with the right version and then fails? Wild guesses
Don’t take this too personally, but I started liking brighter colors when I began to notice their effects on my mood and to manage mild depression, especially seasonal moodiness.