Remove all OptinMonster optins on mobile.

optinmonster-remove-optins-mobile.php

<?php
  /**
   * Plugin Name: OptinMonster - Remove Optins on Mobile Devices
   * Plugin URI: http://optinmonster.com/
   * Description: Remove all OptinMonster optins from mobile devices using wp_is_mobile();
   * Version: 1.0.0
   * Author: Erica Franz
   * Author URI: https://fatpony.me/
   * License: GPL2
   */
 
  defined( 'ABSPATH' ) or die( 'No jellyfish!' );
 
  //* Filter wp_footer
  add_action( 'wp_footer', 'ekf_om_remove_optins_mobile' );
  
  //* Remove all optins on mobile
  function ekf_om_remove_optins_mobile() {
   if( wp_is_mobile() ) {
      echo "<script type='text/javascript'>
        jQuery(document).ready(function($){
          jQuery(document).on('OptinMonsterBeforeShow', function(event, props, object){
            jQuery('#om-' + props.optin).remove();
          });
        });
      </script>";
    }
  }
 ?>