For-Pay ADWARE!!!!
I purchased this app with a full understanding of its limitations, for example unintuitive and frustrating bug where placing moving the caret on the iPad will still result in the iPhone making changes at the end of text block.
The really unforgivable aspect of External Keyboard is that when loading the app on iPad to receive iPhone input, the browser loads a built-in web browser that loads an "anonymous" Google search field (which may feed revenue to Gp imports) and an AdMob ad in the space above the keyboard.
I paid for this app?!
To rectify this situation the developer should allow users to choose email as the default mode on application launch. Even better, provide an empty ad-free space for users to input text to copy-and-paste into a different app.
mistersquid about
External Keyboard, v1.0