FREE - In Google Play
FREE - in Win Phone Store
Endgame study? Ew.
whatever I didn't use that but you have to learn basic mates and how to win won endings and so on and so forth.
Be awesome, sir, be awesome. You will be there soon. be awesome like GM CARLSEN!
You can just scam it and blunder your way to success losing numerous endgames along the way:)
Tactics, I suspect.