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You're welcome @joeyarnoldvn

BTW, feel free to support back and vote for me as a witness if you like my work at promoting newcomers

Should I download the Steem Connect app onto my laptop?

Up to you. I personally prefer to use the "website app" rather than installing a new app on my device.

How much Steem, SP, RC, SBD, or does it cost anything to use Steem Connect?

SteemConnect is an authentication layer and does not cost anything to use.