From now on, you can add the AppStore and GooglePlay buttons to your website.

You can add the App Button to a custom block, choose the button type and size, change the language of the button, and add a link to the App page. Consider that each button has its settings, so it should be customized separately. 

If the primary goal of your site is traffic generation to your AppStore and GooglePlay pages, feel free to place your Apps Buttons in the first and last blocks on your site.

Here is a tip: avoid using a nofollow tag on the links to your AppStore and GooglePlay pages to improve your App Store & Google Play optimization.