Hi, I'm new to Spark.
4. No official requirement. But as it is based on Java, you should use some i3-i5 CPU at least and 2-4 GB of RAM. It will still feel sluggish at times. As it is a Java based app in theory it is OS independent, but that's just a pretty theory. It works on Windows. There are also installers for Linux, but some users are having problems. There are also problems with Mac OS X (latest). So the only system that Spark is working best on and is tested most on is Windows (XP through Win8).
Is this requirement good enough for type of user that open multiple rooms and chats (lets say more than 30 rooms)?
Thanks