It honestly depends on how complicated your app will be, and how talented you already are as a developer. But in truth, you should probably be looking at makin

It honestly depends on how complicated your app will be, and how talented you already are as a developer. But in truth, you should probably be looking at making your Minimal Viable Product in whatever you are the most comfortable in. Because you'll want to get it out and in potential customers hands as fast as possible and prove that your idea really is as useful to people as you believe. I'm also going to take a stab here and say that you're probably not a super experienced developer, because trying to launch and support an app across two different platforms in different languages almost simultaneously isn't an easy feat to manage.