Is Sync for free?

I'm curious to know if Sync is a free service or if there are any associated costs. I've been hearing a lot about its features and benefits, but I'm hesitant to sign up without knowing the full financial details. Could you please clarify if Sync is available to users at no charge, or if there are any subscription fees, transaction fees, or other costs that I should be aware of before I decide to give it a try? I appreciate your help in clearing up any confusion and ensuring that I have all the necessary information to make an informed decision.