No custom, only stock...I'm not even rooted. There are a few apps that are acting up: candy crush, battery bot pro (for a little while with this), & instagram. Candy crush started about 2 days ago (on my Galaxy Note 10.1; i don't have it on my cell), battery bot pro for about a week or so on both my cell and Note 10.1, and instagram today. I think it started after i updated my fb app. Instagram is acting up just on my phone not my Note 10.1.