The Kobo Vox launched in October last year as a Google Android Gingerbread-powered 7-inch screen tablet.
Until now the device - a competitor to Amazon's Kindle Fire in the US - only supported a limited collection of around 15,000 'customised' apps.
However, that has now expanded to more than 500,000 after Google Play, formerly the Android Marketplace, was finally launched on the device.
Customers can also access a range of movies, music, and games using the store.
In addition to Google Play, Kobo has brought other Google Mobile services to the Vox, including Gmail, YouTube, Google Maps for Android, Google Calendar, and Google Contacts.
"This is another big step in our ability to give people an open and compelling multimedia device that can be customized to suit their needs.
"Having access to the thousands of games, apps and tools offered by Google Play makes the Kobo Vox an eReader and so much more."
Current Kobo Vox owners will automatically be upgraded to the Google Play update when they next connect to the internet.
The tablet is available for around £149.99 from major retailers, such as Asda and WH Smith.
Last week, Kobo announced plans to follow key rival Amazon into the self-publishing game by launching its own platform for authors to self-release digital books.