It's been this way for about a month now. Every time I play Graal on my iPhone 6+ I am very jittery and I lag really bad. But the weird thing is when I hop on my PC using the same Wifi connection, i'm not laggy or jittery at all and everything is fine. 
So I don't think its my wifi but correct me if i'm wrong. I've tried deleting the app and reinstalling, turning my phone on and off, but I'm still laggy...
I spar on iphone that's why I'm worried about this. If anyone knows how to fix this I would be so grateful for your insight!
Sincerely, 
Slayer (DoT)