Instagram is nice. It's another feed to scroll while your taking a dump, and that is a good thing. Fuck people who link they're Facebook to it tho. Twitter and maybe Tumblr are fine.
Yeah, I was gonna check for sure, but I think I've already disabled them actually, haha. But if I remember correctly, you can click on the arrow on the right of an Instagram post, and check the box for "Hide all by Instagram".
ya definitely depends on the phone... and with android you can root -> install new kernal and edit cpu governing settings/ OC and UC. then you'll get some crazy battery life