How could a nun developer user make sure this app is safenet app?

Any one can make safe app with one page just redirect to a clear net app pretending that his website use safenet and cheating his users.
So how could users make sure of this app really use safenet technology?

If it’s just a fake clearnet page, it wouldn’t even be able to access / steal your SAFE Network data / SafeCoin

So I don’t think this is a very worrysome attack

The safenetwork/clearnet toggle solves this no?