UWP: Is it possible to create a "personal" app?

Simple question here, yet I didn't find a clear answer: if I want to build a "personal" app for Windows 10 desktop/Windows 10 Mobile, can I do it with UWP? That is, the app would be accessible only by me (and the person whom I give to an .exe file or something like this). Or am I stuck with a WPF app (and I don't know if you can build one for Windows Mobile...). Thanks, Benoit

Solution

You should still upload your app to the Windows store, even if it is for private/personal use.

When opening the Pricing and availability settings of your submission, you are able to set the Distribution and visibility of your app:

With this, you can give your friends "promotional codes" - these are way easier to use than explaining your friends sideloading.

Benefits:

Full control over the persons who will get your app by using one-time promotional codes
Nice store page, so the persons installing your app will see a preview of what they get
Automatic updates