This app allows you to store your data when playing The Binding Of Isaac: Four Souls, and allows play groups to sync up their games so all members can access their played games. You can choose which editions of the game you want to play with, as well as adding your own custom characters and treasures to best match your play group.
The app will also automatically calculate the win rates and average souls for both your playgroup and the wider community, allowing for more general discussion of the "most powerful" characters, and settle any debates about the "best player" in the group. You can record the games you play, and see up to date statistics for different players in your group. If you make a mistake, you can edit and remove the games from your record.
This app also collates the community data stored in its servers to give an indication of the strongest characters as an overall community.