If you've ever wanted to use your Mac's keyboard with your iPhone or iPad, Eltima Software's Typeeto can make it happen.
If you find that typing on the iOS devices' virtual keyboard works just fine, this app isn't for you. If you've bought a third party keyboard for your iDevice, this isn't for you. If, however, you want to use your Mac's keyboard with your iPhone or iPad, this app IS for you.
Typeeto provides a real-time access to a full-scale Mac keyboard for easier interaction and typing on your iOS devices. You can connect as many devices as you need to your Mac and switch between them in one click, which is very convenient.
I like the fact that no additional applications have to be installed on your device. Just launch Typeeto and start typing away. You can copy-paste text from your Mac to the device and the vice versa.
As for Yours Truly, I almost never use a keyboard with my iPhone or iPad for writing anything longer than a text message (though the iPad Pro could change this). If I'm entering articles for AppleWorld.Today or writing/answering long emails, I prefer to use my iMac or MacBook. However, your mileage may vary. If so, check out Typeset.
It requires Mac OS X 10.9 or later. Typeeto is available on the Mac App Store and costs US4.99.