Independent Analytics watches the iawp_output_tracking_script hook, which you can use to output the script wherever you want.
Here is how you can use this hook:
do_action('iawp_output_tracking_script');
The script will be output on the page wherever you call that action hook.
Independent Analytics outputs the script via wp_footer already, so make sure you aren’t adding it a second time by accident. Additionally, the script is only going to function on pages where WP is loaded, so this method cannot be used to output the script on non-WP pages.
