You may be able to make an educated guess using the current format of the iTunes URLs which is:
https://itunes.apple.com/{country_code}/app/{app_name}/id{app_id}?mt=8
Once you create a "New App" in iTunes Connect, you should get your App id, so you could plug it into the URL.
Another alternative, if you have the ability to make a simple HTTP call from your app then you could simply bake the boilerplate portion of the URL into the code (e.g. https://itunes.apple.com/us/app/{app_name}/id{app_id}?mt=8
), and then when your app launches, reach out to the URL where you've specified the proper id of your app. Save that in NSUserDefaults
and construct the URL in code from that point on.
If you do not have a website or custom back-end, you could look into a service like Parse to help you out.
Good Luck!