I'm new in user experience design. Now I started working on my first app idea, it is really interesting. I want to make this application for 3 main platforms right now. If it gets positive responses, then I'm also interesting launching this app as a web application, and for Blackberry too.
I am confused by one thing: Is it right to follow only one design and flow for all these three platforms? Or is it better to make all different mock-ups with basic platform standards, and I can spend my money and time as each platform needs it.
Does it make any sense if I spend money and time for different designs, or is it better that I use one single mock-up design for all platform?