Since this application is not available for the OS BlackBerry Z10 is using, you need to install a sideload client. Sideload acts as an emulator for the Android apps. Visit its website and install it then look for it in the client. Snap makes it possible to install Android apps in your BlackBerry Z10 phone. Once the client has been downloaded and installed, search for Xender and install it. It's the only way to run this Android application on your BlackBerry Z10.