You can easily put the app code on top of the languages. It is very simple.
<?php if(function_exists('faq_home_link')) { ?>
<a class="btn-mini" href="<?php echo faq_home_link(); ?>"><?php _e('FAQ', 'epsilon'); ?></a>
<?php } ?>
</div>
</div>
<!-- Insert a DIV right on top of the col pages DIV class -->
<div class="col socialx">
<!-- Custom Social Contact starts -->
<h4><?php _e('Connect with us or DOWNLOAD OUR APP in your case', 'delta'); ?></h4>
<!-- Custom Social Contact ends -->
</div>
<div class="col pages">
<h4><?php _e('Information', 'epsilon'); ?></h4>
<?php osc_reset_static_pages(); ?>
<?php while(osc_has_static_pages()) { ?>
<a href="<?php echo osc_static_page_url(); ?>"><?php echo osc_static_page_title();?></a>
<?php } ?>
To do that, kindly insert a new DIV right on top of this DIV: <div class="col pages">
In this example I used the simply used the social media div class for custom social media options.
If anything, you can put the code for your App store badges here and I will can help you.