Competition Organiser app for iPhone and iPad

This app helps people to organize tennis, badminton, table tennis, etc by generating matches in a round robin style competition, recording each players points and playing statistics. The app can be used by both players and the organizer and it supports both singles and doubles competitions.
Players can view the competition table, statistics as well as the current scheduled matches. But only the organizer can create new match schedule, add results and add new players. When the organizer performs these actions the app will send an email to notify all the players.
Hope you find this app useful. Please contact me if you have any good suggestions to improve this app.
Thanks to Feng, Chad and Phuong for giving me good suggestions and feedback.