Santa Monica-based Tapcart, a startup focused on helping Shopify-powered e-commerce brands with mobile apps, has raised $50M in a Series B funding round, the company announed Monday afternoon. According to Tapcart, the funding was led by Left Lane Capital, and also included Shopify, SignalFire, Greycroft, Act One Ventures, and Amplify LA. The company said it power the mobile apps for such brands as Fashion Nova, Pier One Imports, The Hundreds, Patta, Culture Kings and thousands of other companies. Tapcart says its platform allows cusomers to create apps using drag-and-drop, codeless tools which merchants can customize for their customers. (Image: Tapcart founders Sina Mobasser and Eric Netsch, courtesy Tapcart).