From iOS and Android apps you can search a for products in a specific store. It displays Aisle number and some broad stock information. Maps have been trialed as well. There are challenges with data quality to get maps to work well. Poor data quality is due to managers being able to move shelves around without updating central systems and stock living in multiple places within a store (same SKU). Locating consumers on a map has also been trialed with LED based indoor positioning. Walmart do try lots of stuff and work with lots of vendors. Rolling out to 4000+ stores is a multi-year challenge. See eReceipts, Savings Catcher, Scan'n'Go, Walmart Pay et al. Usually 3 years from pilot to chain.