Set a time window and your chosen App will be automatically minimised while this period if you launch it.
Block 2: Set your Time
Block 3: Set your App
To track multiple Apps, just copy the Blocks "2,3,4,5" and connect the 'Fork' block like already before (see blocks "8,9,10,11").
You can delete the blocks "8,9,10,11" if you have only one App you addicted to.