to see if your text wen't through when you send a text to someone on the bottome right it will have a time stamp of when you sen't it, when that shows up your message was sen't.
and to find hidden apps you press the 3 dots of the 3 lines on your phone when you go to ur apps. once you tapped it some options will come up, and one of the options will be "show/hide apps" click on that, than it will show you the apps that were hidden.