The Evo can be used on other makes of vehicles, the basic one I have is just for VW's.
I pay £40 odd a year so use it when I want to, but they come with a trial 30 day period where you can do what you want, just remember to unsubscribe or they will take monies.
Some folk just use the free period then pay a tenner for a month when they want to use it.
You can 'force' a regeneration when parked up, which will start when you go on to a faster stretch of road allowing the revs to be 2k or more. I've never used that, my van behaves and regens well (usually when I have just arrived at my destination!)
Easy to use, just remember to open the bonnet when you are playing/changing things. With the bonnet closed you won't get access to all the features.