You get an option, then, of 10, 20 or 30 minute workout. I chose ten. The structure is 20×30 second exercises, each with a video demo.
The only down side is that it assumes you have exercise equipment, but doesn’t tell you. What you need at the start of the workout. I should have had dumbells, but I didn’t.
Ok for free, but there’s better ones out there than this.