Chunk is described as 'Is your time-blocking command center. Plan tasks with precision, get fullscreen alerts, and stay in flow all day. Built for focus, with calendar integration that fits your workflow' and is a todo list manager in the office & productivity category. There are more than 100 alternatives to Chunk for a variety of platforms, including Web-based, Mac, iPhone, iPad and Windows apps. The best Chunk alternative is Trello, which is free. Other great apps like Chunk are Todoist, Kan.bn, Docmost and TickTick.