You could have the option to change the theme, colors of background and conversations because this classic theme everybody could recognize, even from far away. Sometimes you are dating or in a relationship and happened to me, I had a horrible fight with my boyfriend because I was just checking around the guys in Grindr, because we were in a different city, just for fun, without any intention of contact someone, I was alone at the moment, into a car, my boyfriend was coming and from the distance, even with me into the car he recognized the colors, the restructure of the app. I closed the app with enough time when I saw my BF coming but even that way he knew I was in Grindr because the theme is just recognizable from the distance. I know the theme is like a brand but it's not very practical for users, if we have the option to change color background, color of the conversation, font, size... Would be more practical, if you allowed to change the icon why not the theme?