After two consecutive failure, Microsoft’s newfound mission to dominate the iPhone with its own apps continues.

Microsoft’s newest app is a keyboard replacement called Word Flow. The free keyboard, currently only available in English in the U.S., is designed to make it easier to text with a single hand.

Word Flow can be used to a traditional QWERTY keyboard. Alternatively, you can text by swiping between letters to string together words and sentences quickly, a feature Swype pioneered.

But the standout feature for the keyboard is its “arc” mode; once activated, the keyboard scrunches up into an arc (for lefties and righties), which makes it easier to type with one hand, especially on larger iPhones.

Like any good phone keyboard, Word Flow comes with a predictive algorithm to anticipate your next word for faster texting.