What the US Mobile Passport Control App Does
The United States operates Mobile Passport Control, an application that lets eligible arriving travellers submit details before reaching an officer.
Mobile Passport Control is a United States Customs and Border Protection application that allows eligible travellers to submit passport and declaration details on arrival before reaching an officer.
It is separate from ESTA, which is an authorisation obtained before departure, and from Global Entry.
Where a country runs several official apps covering different stages of entry, telling them apart is part of the problem. EntryCheck lists the verified official addresses for the United States.
EntryCheck summarises the update and points to official portals. It doesn't decide whether you need a visa. Confirm on the official site.