Some WIC state agencies are adopting WIC apps that participants can use to check their benefits, set reminders for their clinical appointments, or complete nutrition education. Although WIC apps have already been used by millions of WIC participants, the effectiveness of this significant innovation has never been systematically evaluated. It is unclear whether the participants who use a WIC app have a higher benefit redemption rate than those who do not. To fill this knowledge gap, this brief presents the evidence from a recent evaluation of the effectiveness of the WICShopper® app in West Virginia and Kansas, as well as policy implications.