Walmart has officially launched the Amazon e-book and audiobook rival it's been working on with Kobo this past year. The big box retailer announced its partnership with Kobo's parent company Rakuten back in January, promising to give its customers (in the US, at least) an easy way to access the six million titles in Kobo's library. Now, you can finally access the partner's e-book experience via Kobo e-readers and their new co-branded apps for iOS and Android devices. You can also purchase e-books on Walmart's US website, where they're listed alongside their physical counterparts. Take note that due to an agreement with Apple, the e-book store isn't visible inside the iOS app, though the application will show any item you purchase via other means.