The official repository for Latte Locator, aka Starbucks Locator. https://www.microsoft.com/en-us/p/latte-locator/9nblggh0f2cn
Initially named "Starbucks Locator", this app was the only way Starbucks customers on Windows Phone 7 and 8 were able to get features like their Android and iOS comadres.
After it became popular, Starbucks took notice and issued a Cease and Desist for trademark violation. The app was then rebranded to Latte Locator and re-published.
This is a Windows Phone/WinRT project type. In you want to move it to UWP, you can move all the code into the same UWP project and it should work as-is.