Really great keyboard, but I don't agree with the decision to replace San Fransisco with Roboto. The weight and position of the type is off on the keys, and it makes the keyboard feel less native than it should.
They've made the conscious decision to use their Material design and Roboto in all their iOS apps. This is funny because in their Android UI documents they stress that you should stick with the OS style. But, they do exactly the opposite on iOS. It's one of the reasons why I use the Google apps as little as possible.
I doubt I'll use this keyboard. I have an iPhone 5 so screen space is limited and I don't want to waste it on a big Google logo in my keyboard. Plus, I can't see that I'll have much use for it.
Good news for you. John Gruber reviewed Gboard and one of his complaints in regard to the UI stylings was that "they should have gone the whole way and used San Francisco for the typeface, too."
To which Rajan Patel replied:
>"@daringfireball ..[we should go all the way w/ design]..
I use YouTube daily on my iPhone with Red and it is incredibly feature dense and useful and because of good search pretty quick too. It does seem crowded but I have difficulty imagining a better solution and really like the App.
I doubt I'll use this keyboard. I have an iPhone 5 so screen space is limited and I don't want to waste it on a big Google logo in my keyboard. Plus, I can't see that I'll have much use for it.