Split any group into fair teams automatically.
One per line.
Split a group into random teams in one tap, so nobody has to be picked last and the sides come out even.
By size, yes: players are dealt out one at a time, so teams are equal or within one person of each other. Skill isn't taken into account, so reshuffle if one side looks stacked.
As many as you like. You need at least as many people as teams, otherwise the button stays disabled.
Trivia and charades teams at a party, classroom group work, five-a-side football, office icebreakers and splitting a big group into breakout rooms.