You can also run the Google Play Store application on your PC, however you will need to use an emulator - which is pretty straightforward. You simply need to log in to your Google account to start purchasing apps on your mobile device. Google Play Store is a great resource for apps, games, books, and movies that you can use on your phone.
You can find just about anything you need from time trackers for your office to games for your kids. Google Play store has a huge range of apps, books, music, and movies available.