In Windows 10,the difference between a program and an app is that the app must be installed from the Windows Store.

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Windows 10 introduces the concept of Universal Windows Platform (UWP) apps, which are designed to work across different devices with the same codebase. UWP apps can be downloaded and installed from the Windows Store. However, traditional desktop programs can also be installed on Windows 10 by downloading them from the internet or installing them from a physical disk.

In Windows 10,the Difference Between a Program and an App