use build on phone for personal use only without app store?

Is there a way that I can make a build of my app and use it on my phone only for my phone for personal use only without having to go through the app store?

Yes of course, go to file build settings and build it for android. You will need to get android SDK if you don’t have it already. Download Android Studio & App Tools - Android Developers

After installing the SDK go to EDIT → Preferences → External Tools → and set the android SDK location. Good luck

Then just transfer the .apk to your phone and install it.