This is definitely something I was cognizant of when I made my product page. Since I have an app for both platforms, 2 buttons works very well, allows the user

This is definitely something I was cognizant of when I made my product page. Since I have an app for both platforms, 2 buttons works very well, allows the user to make the choice, and you can even add a simple useragent check and redirect the user after X seconds if they haven't actioned. There are some interesting "rules" (or recommendations) around how to place app store images, their sizes, etc, too.