After disabling NEST Trader I have discontinued trading with Zerodha. Kite & Pi are at all user friendly software. They are not at all keyboard friendly and you may loose money trying to punch orders using mouse. IF YOU ARE AN INTRADAY TRADER DONT COUNT ON ZERODHA UNLESS YOU SUBSCRIBE FOR THE Rs.2000/- per month Kiteconnect.
I have been associated with Shah Investor's Home Ltd. since a while and they have a very good web platform for trading and they have recently come up with a new app which I have started using, I can say that it is very easy to use and navigate and it is completely free.