I just got an iPad to replace my samsung tablet. I love the iPad. Far superior to samsung tablet. I have only one issue that I need help on. When reading Google Play Books app on the samsung tablet, the app blocks android from turning off the screen. When I stop using the app, android goes back to turning off the screen after 2 minutes. When using that same app on my iPad the screen turns off after 2 minutes. I'm a slow reader so it really bothers me. Is this normal?