I just release a new iOS app: Fast Keyboard.
(I am the developer)
It is a text editor with an addition two-row keyboard to make typing faster.
On top of the standard iOS keyboard, you can have numbers, symbols, unicode symbols, frequently used words, and even email/article templates.
Then you don't need to constantly switch between the letter keyboard and the number keyboard. And you can type with fancy symbols: π,☆,÷,♥,♬ and so on.
And the text you wrote links to Dropbox, Facebook, and Tumblr.
And there are some advanced functions, like
• Left and right arrow keys to move the cursor
• Search a word
• Word, line, character counting
• Key statistics
If you have any question or comment, please let me know. Thanks a lot.