Store your game data:
-games
- game time
-average players
-last time played
-how many times have you used an expansion or module
-how many times factions/empires/races have been used and how many have won

Compare with the other players in your group:
-scoring based on ELO
-win/match ratio
-high and average scores

Create several game groups, each one with its games, players and statistics.

Users are not linked to a player profile so not all players are required to have the app or be registered. Within the group, the profiles of all the players are added and the user who creates the game assigns who played the game.
The application is only required if you want to see the data of your game group or to be able to participate within the group by adding games