What app is this? What does it do and why are you interested in it? Who publishes it? Are you trying to compare it to some other similar apps?  
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If I know what you are looking and why, perhaps I can give you some useful feedback.

I have used this app for several months and I like it a lot.
I find it easy to do research and read insightful articles about stocks I have or am interested in and I can easily track my portfolio.
It is definitely worth using to see if you like it.