If you play football, but not in a team that’s part of a KNVB related club, you can create a custom team. Custom teams is intended for football players who use a different organisation than the default nation’s league like Footy or Powerleague. But it’s not limited to that, if you’re part of a team that’s part of a different organisation like a university competition or company competition, you can create that competition as the organisation and use the app.