I think that these tests focus on some aspects of your personality. And everybody should keep that in mind. I find them helpful. Not for diagnosing but maybe for some insights... or something to think about. Everyone who works on him/herself can be the judge of the test results. I agree, they do not...

What do you think about personality test apps? I bought Freudian test on App Store, it seems legit. I believe it was worth the money. Is there anyone who could give me their professional opinion?

Freudian Personality Test - Self-Assessment Quiz: http://smarturl.it/FreudianTest