We live in an era of fragmented time. People check their phones in short bursts...

https://source-wiki.win/index.php/Progression_Mechanics:_Why_Your_Users_Need_More_Than_Just_%22Good_Content%22

We live in an era of fragmented time. People check their phones in short bursts between real-world tasks. If you are still designing for long sessions, you are missing the point. This piece explores how to build for mobile-first habits