If you create a website and use responsive web design (the website automatically changes the way it looks on different screen sizes), you can have your cake and eat it too. :)

The website would be usable from a large screened device (like a laptop) and if it is accessed via a small screen (like a smartphone), it will "reformat" the way it looks to make it usable on a small screen.

You can go one step further and create a mobile app which will create a "webview" of the website. Thus, when people open the mobile app, they "see" the website and interact with it the way they would with an app.

I have experience in responsive web design, smartphone development, and implementing webviews in smartphone apps. Please give me a call if you would like more information about these subjects.

Cheers,
Jordan

30% of internet traffic is now mobile, and we should reach 50% soon according to KPCB. If your idea can work both for mobile and web, I recommend you go mobile first as you may get more traction and more interest from recruitee and investors.

Go Mobile First.

There are many advantages from having a large user base, easy discovery on the app stores, beautiful User Experience and most importantly simpler product.

Let me know if I can be of further assistance:
Evan@EvanLuthra.com

Nowadays it's very rare to get away with just one of them: you need both. If you're strapped for cash, consider PhoneGap which will allow you to re-use most source code across platforms.