Microsoft's Word Flow keyboard is now available on the iPhone, providing nice customization options and a unique Arc mode for one-handed usage. The initial release is U.S. English-only, but it's not clear if its distribution is restricted.
Recent Word Flow Stories
Microsoft's Word Flow keyboard will come with a new feature, a one-handed mode that has the keys in a fan-layout that should make it easier to type with only your thumb.
Microsoft is about to bring one of its key features from Windows Phone to other platforms as the company is sending out beta invites for its Word Flow keyboard to iOS users.