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Quick Definition

An app is a computer program. Specifically, this refers to a program designed to run on a smartphone or tablet. Apps are becoming commonplace these days, as it seems everyone has a smartphone or tablet wherever they go.

Just so you know, there is a stigma about using apps on a desktop computer. This is because many apps are designed with hand held devices in mind, and they are often ported to desktop computers with little or no changes, leaving the program hobbled in its new environment.