This is fantastic information @stlmco!

Am I understanding this correctly - an all US Citizen crew aboard a charter in the BVI and enter the USVI (in our case plan would be St. John) and check-in via this app? In this case, all that would be necessary is clearing out of BVI prior to heading to St. John? We would then need to return to the BVI - do we need to go to customs to clear back out of USVI?