I have use this app a few months before.But it is fun making app really.One of the major problem is related to verification.The user does not get verified easily.One has to call customer care many times like I did.Moreover, I have uploaded documents scanned clearly but these get rejected everytime.But when I uploaded blurred image, it got verified.What is this? Also its chargres levied in buying and selling is high.Also its user interface is not better for performing trading.Real time values are not updated automatically.One has to refresh for current values.It has to be updated for bitcoin trading.