Shopify apps can add extra features to websites. There are thousands of apps that can be used depending on the requirements. Oberlo, Kit, Privy, Seguno, Printify, Facebook Channel, ShopSync, Klaviyo, ShipStation, SMSBump, PageFly, HelpCenter, Aftership, Tidio and Yotpo are the 15 most important apps that we recommend to our clients. At Spark Interact, we can also develop custom apps for Shopify.