Paste the class list once and pick a name at random, large enough for the back row. It can keep going until everyone has had a turn, which is the part that makes it fair.
Alice
ALREADY PICKED
Paste the register in the box, one name per line, and press the button. The name fills the screen so the class sees the same thing you do, which is what stops the argument about whether you always pick the same people.
Leave the tick in place and nobody comes up a second time until everyone has had a turn. That is the difference between a fair rotation and a coin toss thirty times in a row. Untick it if you want plain random every time.
Learnify turns the class into a role-playing game run from the teacher's screen: points for real reasons, avatars that evolve, attendance, groups and quiz games. Pupils need no devices and no accounts of their own.