As somebody who's recently started going to therapy (and a tech worker), I'm skeptical that apps will help -- most of the point is being able to talk to a real person, in a real place, and get honest feedback.

This said, therapy is not as "modern" as people think. Catholic confession has been around for literally millennia, and it basically had that same role: one guy will listen to your deepest thoughts and shames, absolve you from guilt, and discuss ways for you to be a better person. It's just that we now know how to do it without all the religious baggage.