Focusplan is a visual planning and time-blocking app that lets users drag tasks onto a weekly calendar canvas to build a realistic, committed schedule. Built for individuals and freelancers who struggle to translate their task list into actual blocked work time, Focusplan's whiteboard-meets-calendar interface makes the planning process visual and satisfying. Its simplicity — no databases, no complex hierarchies — focuses entirely on the one problem most task apps ignore: getting tasks from the list onto the clock where work actually happens.

Reference:

Time Blocking on Wikipedia

https://en.wikipedia.org/wiki/Time_blocking