No problems

Ive not experienced any of the issues stated by other reviews. I use this app on iPad Air 2 and iPhone 6+ all latest iOS.
My wife has no problems either on her iPhone 5s and iPad mini 2nd gen.
I use mine at home and in Sabbath school class no problem with bible links or audio or video. I can hilite make notes everything the app offers works for me

breaktime about Sabbath School 4