on the left side of the screen have conversation tabs to switch between conversations. Just like the SMS app "Hello SMS". this app was a ENORMOUS hit and people loved the idea of it. since then it lost its fuel and was cancelled. hundreds of thousands of people have been looking for alternatives. Textra could achieve this. it's light enough, far fast enough, and already popular. you could make this an option in the settings as some people may like the traditional conversation screen.