You will get a free lanyard when you order it on the App. There are accessories to buy at the same time or on the ship.
We used fitbit bracelets back in 2018 and 2019. But, we bought the rubber ones on PCL this year. We got tired of the lanyard so prefer the bracelets. The ones they sell fit better than the fitbit ones. I also have the bangle gold bracelet and that is okay, looks nice anyway. And the gold necklace, but that is not easy to scan, you have to pop it out to use it.
I like the PCL recycled material bracelet because it’s waterproof and it’s easy to scan off and on the ship at ports, etc.
It’s just a matter of choice.