What's the best iOS app for expediting customs and immigration when re-entering the U.S.?

For eligible Global Entry members, Global Entry Mobile streamlines re-entry into the United States. Instead of waiting in long customs lines, you can use the app to submit your arrival information, including a photo, before approaching customs. This can significantly reduce your processing time and allow you to bypass the regular lines, making your arrival much smoother. The app provides a convenient and efficient way to comply with customs requirements, especially after a long international flight. It's particularly useful in busy airports where Global Entry lines can still experience congestion. While it requires pre-approval for the Global Entry program, the app itself is free to use and can save you valuable time and stress upon arrival.