Tennis Game Scheduler

I'm a amatue tennis player. Whenever I played a tennis, I needed this kind of tool.
I found several apps but those are not free and need a registration.
So, I made this app by myself.
Main features:
* Generation of game schedules automatically
* Editing of the game schedules
* Showing of rankings automatically
Remarks:
* Play type to support: Both double and single
* Maximum players: 16, minimum players: 5
* Game scheduling method: Hanul-AA-2021 and Hanul-AB-2021
* Seed assignment to avoid unbalancing of matching
* Matching from two groups. Divide the players into two groups, and choose one player from each group to form a team.
* Automatic calculation of rankings by assign points of all games
Feel free to use it and welcome to your feedback.