Is there a cross platform app development option?

Episode 1116 (48:20)

Dave from Ayersville, OH
Coding

Dave is looking to get into App development. He'd like to make apps for multiple platforms, and wants to know if there's a cross platform environment that makes it easier. Leo says that developing natively is always the best option, but cross platform is very popular with developers who don't want to triple their effort. Different platforms use different languages, though.

PhoneGap.com is an option. Unity is a good one for gaming. Xamarin is pretty robust platform that can also incorporate .NET.