I would like to consider one of Samsung's new phones that are advertised as waterproof.....for my wife (

).
Has anybody switched from iPhone to android? She is a non techie by choice. Has reasonable/fair skills with iPhone. Is there a very big difference operating wise from one the the other? Can it be said the android is apple like in it's user access? If you know apple does it help or hinder when going to android?
Are there as many apps for android?
And any other advice would be appreciated.
We have Verizon as our provider.