If you’re a US citizen, you probably want the Global Entry pass. It will give you TSA-Pre privileges and quicker reentry into the USA upon your return from overseas. But if you can’t afford Global Entry for now, at least you can pick up the Mobile Passport App from Airside Mobile. Available for iPhone or Android, see a review here…

http://appleinsider.com/articles/16/07/07/how-to-skip-the-airports-us-customs-line-with-your-iphone

The Mobile Passport App would reduce the reentry wait, but it wouldn’t grant you a separate custom exit lane like Global Entry does. But hey… every little bit helps.