Mobile Passport, the app is available at the Apple Store is the more tech-savvy way for faster entry into the United States after an international trip. Mobile Passport is free to purchase and free to use and is a collaboration between the Airport Council International-North America and Airside Mobile in collaboration with Customs and Border Protection.
The app is efficient in having your customs paperwork filled out once leaving your aircraft. Although the program is just available in 5 major United States airports(MIA, ATL, ORD, SFO, and SEA), I see a lot more coming in 2016. I transit quite often to Miami international when traveling to the Caribbean hence why its great for travel.
This blog was updated on May 31st, 2018. As of that date, the mobile passport is in 25 airports and one cruise port.
Editors Note: Opinions expressed here are the author's alone, not those of any parties mentioned. None of the entities mentioned has reviewed, approved or endorsed the content listed in this post.