Porofessor.gg the official app for the Porofessor.gg website.
It is a live game search app with a lot of detailed stats on your teammates and on your opponents. It uses the complete 30 days history of each player to compute those data, and to be able to show you what you need to be able to pwn your opponents :)

What are the available stats ?

Player stats with the current champion (win, played, kda)
Gold stats (@10, @20 + graph)
Minions killed stats (@10, @20 + graph)
Wards placed stats (@10, @20 + graph)
Kill participation
Damage per minute
Winrate against the lane opponent
Current ranking + ranking history
Current roles + main roles
Recent matches history