Nest Plus is for charting and the starter version is free for now. so no harm in installing it if you dont have realtime charting available to you from any other software.
Its the same in NOW as well, for NEST PLUS which is there in NOW?
PS: I do have other means for charting, its a subscription that I have currently. Hopefully Zerodha's efforts in getting a tool with decent charting will be fruitful with this NEST version.