Does Handshake app cost money?

I've heard about the Handshake app and I'm curious about its pricing structure. So, I'm wondering, does the Handshake app cost money to use? Is there a one-time fee, a monthly subscription, or is it completely free? If there are costs associated with it, what kind of services or features do they provide that justify the expense? I'd appreciate any clarification you can provide on this matter.