CHECKBILLIARD represents a quantum leap in billiard training methodology. It's a tool, or actually, a "virtual billiards coach" which allows you to precisely determine your current strengths and weaknesses – and matches specific, personally generated exercises and practice routines so you can improve where you need it most.
It's safe to download the app. Checkbilliard GmbH has created CHECKBILLIARD that falls into the Sports category. The most recent release was on May 7, 2018 and the tool was downloaded and set up by over 10K users.