I am using the Flattrade app for long time and I believe it is a good app mainly for the first time stock market investors. It is user friendly and opening account with them is simple and easy. They are not charging for the demat account it is free! and Free equity delivery on all the segments NSE, BSE & MCX. Futures, Options and Intraday they charge only Rs.10 which is lowest among the brokers. I enjoy getting guidance through this app from my dedicated managers for trading. Try https://flattrade.in/