Over 86.5% of an average user's time is spent focused on applications on tablets and mobile phones meaning only up to 13.5% of a user's time is spent in a browser.
Your website should be mobile compatible for usability and most users expect to find a business's companion app and will search for your presence on the App Store.
Creating a mobile app for your business can have serious advantages. If a user can access and interact with your data, buy your products and procure your services easily 'on the go' this can drive sales, customer loyalty and give your business huge advantages over your competitiors.