The deal is good until up to 1 million Doritos Locos Tacos are given out, or while supplies last, at participating Taco Bell locations.
The offer is part of a number of app-exclusives the chain has put out, with plans for additional offers in the future. They also currently offer $1 Freezes when ordered using the mobile app. Taco Bell also recently offered early access to the now widely available $1 Crunchwrap Sliders. Early access via the app is also something the brand is looking to push in the future.