[berkes]

In most of Europe Android is the dominant platform as well. Only very few demographics have IOS as dominant platform. So it is a very reasonable business-choice to start off with an Android app.

I would, however, suggest you clarify your intent to reach other platforms in your communication. E.g. "iPhone app planned. Subscribe to our newsletter to be the first to learn when we have an app for your iPhone" or so. That way you show interested people that it is on your radar, you have plans, but simply not the resources (yet).