Hybrid Mobile Apps

Hybrid apps are ones that work in web technologies (HTML, JavaScript, etc.) to build a web app on a mobile device. Not that your users would ever be able to tell that's what they're using!

Hybrid apps work on both iOS and Android and are capable of amazing things, with a few limitations. They don't look particularly like either iOS or Android apps but they do have a very valid business case - rather than build separate apps you can develop one app that works on all platforms.