For most folks, creating a native application on a platform, such as Android or iOS, requires learning an entirely new programming language. While it is always good to learn new languages and expand your skill set, wouldn't it be cool if you could take your existing HTML skills and use them natively on a mobile device?
Luckily, there is one such platform PhoneGap (http://www.phonegap.com), which is an open source project that allows you to take HTML pages and create native applications. This code is entirely free and can be used to develop applications for iOS (both iPhone and iPad), Android (again both phones and tablets), Blackberry, WebOS, Windows Phone 7, Windows Phone 8, Symbian, and Bada. PhoneGap works by creating a project in the native environment and pointing to an HTML file. Once it is set up, you can use your existing HTML, CSS, and JavaScript skills to create the UI and the functionality of your application.