Bracket Maker allows you to create your own tournament. The tournament field can have 4, 8, or 16 teams and allows you to fully customize your team names and match-ups. This is perfect for ping-pong, air hockey or even beer pong tournaments!!
https://market.android.com/details?id=appinventor.ai_tylerleonard94.BRACKETS&feature=search_result
https://market.android.com/details?id=appinventor.ai_tylerleonard94.BRACKETS&feature=search_result