Obviously I can't review this.... since I don't own a Volvo, but I was intrigued after a) all the TV commercials for Volvo's apps, and b) several readers recommended it as worthy of inclusion in AAWP's app directories. See below for details.

From the Store description:

The official Volvo On Call app allows you to access your vehicle from your Windows Phone. This requires a vehicle from model year 2012 that is equipped with a Volvo on Call Telematics unit. If your vehicle fulfills these requirements you will, depending on your model, be able to:

• See vehicle dashboard values, such as fuel level, trip meters, and more, in the App.
• Control your fuel fired parking heater, if the vehicle is equipped with a fuel fired parking heater. 
• Locate your vehicle on a map or using the vehicle signal horn and turn indicators.
• See the current status of doors, windows and locks for your vehicle.
• Lock and unlock the vehicle.
• Request roadside assistance from the App.
• Have an electronic driving journal that will create trip reports for every trip made with the vehicle.

Some screens of this in action (at least in promo mode):

Integration between the application and vehicle looks very tight, from sending the car's satnav a destination to (right) checking on all under-the-bonnet characteristics and stats.

Then there are the user-facing aspects, including starting (or stopping) the engine remotely, setting up the heating or aid conditioning. Yes, all the stuff you've seen on TV; (right) there's a demo mode, which at least lets you run through most of the screens, even without a real Volvo car to talk to!

You can grab Volvo On Call UWP (and for 8.1) here in the Store. Comments welcome if you own a compatible Volvo and have tried the application.