Power Apps Variables Explained: Global vs Context vs Collections

When I first started learning Power Apps, variables confused me more than almost anything else. At first they all seemed the same: Global variables Context variables Collections They all store data, so why do three versions exist? After building a few apps, the difference finally clicked. The real distinction is scope and purpose. Once you understand where each variable should live, building Power Apps becomes much easier. Let’s break it down in plain language. Global Variables Global variables are available anywhere in your app. You create them using the Set() function. These are useful when you need to store information that multiple screens need to access. Common examples include: Current user information Selected record IDs App-level settings Navigation state Example: Set(varUserEmail, User().Email) Now varUserEmail can be used anywhere in the app. You’ll often see global variables created when a button is clicked or when a user selects something from a gallery. Think of global var