This is not the Overwatch game, it is a helper tool for Overwatch players.

Are you keeping track of your Overwatch competitive rank by hand? Maybe in a dark and cold sheet somewhere?
Well no need for that anymore! Overwatch Overseer will make keeping track of your rank a breeze! You can get access to some detailed stats per season right now, even if you have multiple accounts.

This app is being actively developed and there're some interesting features on the horizon.