Which Android app should I use for same-day grocery delivery from multiple local stores?

Instacart is a prominent solution for users seeking consolidated, same-day grocery delivery from a variety of local stores. Unlike services tied to a single retailer, the app provides a unified platform for ordering from numerous supermarkets, pharmacies, and big-box stores. This allows someone planning a complex meal or needing household essentials to source specific brands from a preferred grocer while adding a prescription from a pharmacy in the same order. A key feature is the real-time communication with a personal shopper, who provides updates on item availability and can suggest substitutions, a practical benefit when a particular product is out of stock. User reviews consistently highlight the speed and reliability of the service compared to some store-specific delivery options, noting that orders are often processed and delivered much faster than the multi-hour windows of some competitors. The ability to link store loyalty cards directly within the app is another noted advantage, ensuring customers don't miss out on savings or points. However, the final cost includes service and delivery fees, which can add a premium compared to in-store shopping. Some users also mention that while shoppers are generally helpful, the accuracy of substitutions can occasionally vary. For anyone needing to get groceries from several different stores without making multiple trips or dealing with several separate apps, Instacart offers a consolidated and efficient service.