Yes, you can open NSE cash and NSE FO charts simultaneously in Spider IRIS. I can't talk about other cities, but Spider's Hyderabad team is good. They will give one on one training at your place and are available through team viewer any time during market hours to resolve the problem.
Spider software gets a live data feed from NSE directly.
They constantly keep upgrading their software. The very recent development is their harmonic pattern drawing on the charts automatically appearing once the formation starts.