1. A device comprising: a processor, at least partially implemented in hardware, to: generate a similarity matrix defining a similarity between a plurality of computer applications according to a categorization of application programming interface (API) calls, the similarity matrix being generated from a term document matrix using singular value decomposition, the term document matrix including a first dimension of first entries corresponding to the plurality of computer applications and a second dimension of second entries corresponding to categories of the categorization, elements of the term document matrix having values based on a quantity of API calls in a computer application corresponding to a first entry of the first dimension, and in a category, of the categories, corresponding to a second entry of the second dimension, and at least one of the API calls corresponding to one of the categories, the similarity being based on weights for the API calls contained in the plurality of computer applications, a respective weight for a respective API call in a respective computer application being based on a quantity of API calls in the respective computer application and a quantity of computer applications, of the plurality of computer applications, that contain the respective API call; receive a selection of a first computer application of the plurality of computer applications; and provide an indication of at least one second computer application, of the plurality of computer applications, using the similarity matrix and based on the selection of the first computer application.