I currently have a complete app developed using ionic and angularjs that is functioning well on iPads and Android devices. Now we are looking to launch it for iPhones and Android smartphones with some design modifications. Is there a method to achieve this while using the same codebase since the functionality remains unchanged and only the HTML needs to be adjusted? I have gone through the documentation for Ionic platform, but it appears to only specialize in separating the Android and iOS platforms. Any assistance would be greatly appreciated. Thank you.