What is a significant feature of the Sonic mobile app regarding customer transactions?

The Sonic mobile app includes a significant feature that allows for mobile payment, which enhances the customer experience by providing a convenient and efficient way to complete transactions. By utilizing the app for mobile payments, customers can access a seamless checkout process directly from their smartphones, eliminating the need for cash or physical cards. This feature not only streamlines the payment process but also supports contactless transactions, which have become increasingly popular and important in today's digital world.

Other features that involve in-store purchases only, cash-only transactions, or limited-time offers do not provide the same level of flexibility and convenience that mobile payment does. The mobile payment capability is crucial as it aligns with modern consumer preferences for quick, hassle-free solutions while also integrating with loyalty rewards and promotional deals available through the app.