Apple CarPlay makes it possible to control many of the functions available in your iPhone via the car's center display. Here you can read about Apple CarPlay and what you ought to know before using the function.
When your car is connected to the Internet, you can easily download and update apps directly from the car's center display. You also have the option to uninstall apps.
When you connect a Bluetooth® device you can do this from either the device or your Volvo. This article describes how to set up a connection (pair) between your Volvo and a Bluetooth® device (e.g. cell phone or tablet).