If the app is only available on a physical Windows Phone device and you want to copy the .xap or .appx to your PC for backup, use a Man-in-the-Middle proxy.
Before you download anything, you need to understand the container formats. Trying to install an APPX on a Windows Phone 7 device will fail, and a pure XAP will lack the ARM64 hooks for Windows 10 Mobile.
The “Better” Approach: Do not simply google “download XAP file.” That is inefficient and dangerous. Instead, you will use a combination of local caching, browser developer tools, and dedicated repositories. download windows phone apps xap appx files to pc better
If an app cannot be downloaded, it can often be extracted from a phone backup or a Flash ROM image.
If you are hunting for Windows Phone 7.x, 8.0, or 8.1 XAP files, forget the store. The community has preserved these. If the app is only available on a
The Better Way: Use Windows Phone SDK (for developers) or XAP Installer Tools.
However, to download the raw file from a source: The “Better” Approach: Do not simply google “download
Why this is better: You get a clean, unmodified XAP file ready for sideloading via Windows Phone Power Tools.