How to Theme the Google Keyboard on Your Galaxy S4 to Look Like an iPhone
In previous guides, we showed you how to easily tweak your Google Keyboard by using various colors and shapes, installing an Android L theme, or adding a convenient number row to its main display. And now, you can add another Google Keyboard theme to your arsenal by making it look like your iOS friend's iPad or iPhone keyboard.
All you'll need to get started is a modded version of the Google Keyboard from Android dev Shaftamle.
In order to acquire this new Google Keyboard, you will need to uninstall any existing version you may have first. On a Samsung Galaxy S4 or other non-Nexus device, simply uninstall the app as you normally would.
After installation, select Open and follow the quick three-step prompt that will ensure that this keyboard is both configured and functional.
In less than a few minutes your new keyboard will be installed and active. Below, you can see the original Google Keyboard vs. the iOS-Style Google Keyboard.
Your iPhone friends can't switch to an Android keyboard, so give them yet another reason why Android is better. Compare and contrast, and enjoy.
If you're unsatisfied with the keyboard or have grown tired of its look, simply uninstall the app like you would any other. This will enable the stock Samsung keyboard (unless you're using a non-Samsung device), so just reinstall the standard Google Keyboard from the Play Store.