Can analyzer help

hello everyone, I would like information, if I buy a can analyzer and connect it to the can bus line can I connect it directly with realdash or do I need another interface?

this is too general a question!
1 RealDash where? Win or Droid?
2 Which CAN do you want to buy?
3 what is the purpose?

Thanks for the help,
I use realdash for android
i want to buy seedstudio can analyzer
And i want to change the orginal cluster with realdash

Here is a list of RealDash supported CAN adapters: