iOS 11 the Apple company has implemented an extremely useful function, more precisely a keyboard that allows writing with one hand depending on the hand in which you hold the phone, the idea from Apple not being new, but being implemented exactly as it should be.
iOS 11 allows the activation of this keyboard directly from the usual keyboard that we have when we write messages, and in the video clip below you can see how easily it can be activated and you will be convinced of its usefulness after using it on phones iPhone.
iOS 11 has this new keyboard available only for iPhone phones, so you won't be able to use it on iPad tablets, so when you type with one hand using iPhone, you will be able to do it much faster and easier than before.
