how to trust untrusted apps with ios 9.0.2

Just downloaded IOS 9.0.2 to my IPad and Iphone. Have been using Vshare on my IPad and wanted to download it after the update. When I did it said that the app wasn't trusted and that I needed to trust the app. Everything I have seen says to go to general settings/profile/trust the app you need to trust and then open the app and use it.

When I go to general settings there is no profile listed under the settings page. I noticed the same thing on my Iphone. Everything I have seen on utube to help me shows the profile setting under the general settings tab but mine isn't there.

Looking for help on either how to get the profile settings to show up or on how to trust and untrusted app without the profile settings.