ETDiv takes a group of players with 1-9 ratings, divides them into two teams, using player ratings to keep the teams even. It has a unique feature where you can specify up to 7 pairs of players (for example, your two best players) who cannot be on the same team. After adding players, specifying their ratings, and specifying which players you want separated on opposing teams, tapping the "Divide" button generates one MatchUp (with the minimal difference in player average ratings between the teams, i.e. the most even MatchUp). If you don't like that MatchUp, keep pushing the 'Next' button and ETDiv will keep generating new, unique MatchUps until it can't find any more new, unique MatchUps. Beats having "Captains" alternately picking players for their teams.