Mintel Research can be used to find research on industries and consumers.
Hint: keep your sarch simple at first by entering "coffee" in the search box. You can expand your search to "food service and apps". Note that this resource will provide a great deal of national information on this industry.
Statista is a portal for quantitative data, statistics and related information. Use the search box to find information of interest, or choose from dropdowns providing access to information about industries, digital markets, consumer markets, and topics such as media, business, and society. Statistics, charts and/or graphs may be downloaded in the following formats: Excel, PNG Graphics, PowerPoint and PDF.
Gartner Group Resources is a good place to find research on the app development process for businesses, large and small. Gartner reports often present research on ROI and product development and lifecycle for electronic service implementations.
Forrester Research is a good place to get an understanding of how companies are leveraging technology to meet customer needs, including the use of apps for sales and services.