For several years now, Samsung and Microsoft have enjoyed a partnership that gave preferential treatment to Galaxy phones. At first, that simply manifested as pre-installed Microsoft apps that, naturally, people considered bloatware or special offers on some Microsoft subscription services. That partnership eventually bore more fruit, like deep integration with Windows 10, as well as the new versions of its productivity apps specially designed for Samsung's new foldable phones.

Link: Galaxy Z Fold 3 gets Microsoft apps designed for foldables
via http://www.slashgear.com