If storage was low, the app recommended moving photos or videos to OneDrive or an SD card to make room for the installer.
If you are looking for an "Upgrade Advisor" for a modern PC or specialized storage system, the name has shifted to different tools: upgrade advisor app download
Microsoft still provides documentation for enterprises on how to use pilot devices with the app to determine upgrade eligibility in managed environments. Modern Alternatives for PC and Enterprise If storage was low, the app recommended moving
Because the Windows Phone 8.1 Store officially closed in December 2019, the standard way to download the app directly from your phone no longer works. However, there are still ways to access its functionality or legacy installers: However, there are still ways to access its
For collectors and enthusiasts, sites like WindowsViet host archived versions of the app (such as the DHT Upgrade Advisor) for side-loading onto old Lumia devices.
Originally, the app served as a "gatekeeper" for major operating system updates. It didn't just check for updates; it performed several critical system health checks:
Since the mobile store is down, Microsoft previously recommended the OTC Updater tool for PC. It bypasses the need for the mobile app by downloading updates via a USB connection.