diff --git a/application/controllers/Clublog.php b/application/controllers/Clublog.php
index e40b9fd1e..ad61ec00a 100644
--- a/application/controllers/Clublog.php
+++ b/application/controllers/Clublog.php
@@ -25,6 +25,7 @@ class Clublog extends CI_Controller {
 	public function upload() {
 		$this->load->model('clublog_model');
 
+		// set the last run in cron table for the correct cron id
 		$this->load->model('cron_model');
 		$this->cron_model->set_last_run($this->router->class.'_'.$this->router->method);
 
diff --git a/application/controllers/Eqsl.php b/application/controllers/Eqsl.php
index e801b1366..790a929d2 100644
--- a/application/controllers/Eqsl.php
+++ b/application/controllers/Eqsl.php
@@ -714,7 +714,7 @@ class eqsl extends CI_Controller {
 	 */
 	public function sync() {
 
-		$this->load->model('cron_model');
+		// set the last run in cron table for the correct cron id
 		$this->load->model('cron_model');
 		$this->cron_model->set_last_run($this->router->class.'_'.$this->router->method);
 
diff --git a/application/controllers/Hrdlog.php b/application/controllers/Hrdlog.php
index b798c963e..0a0b09bda 100644
--- a/application/controllers/Hrdlog.php
+++ b/application/controllers/Hrdlog.php
@@ -25,6 +25,7 @@ class Hrdlog extends CI_Controller {
     public function upload() {
         $this->setOptions();
 
+        // set the last run in cron table for the correct cron id
         $this->load->model('cron_model');
 		$this->cron_model->set_last_run($this->router->class.'_'.$this->router->method);
 
diff --git a/application/controllers/Lotw.php b/application/controllers/Lotw.php
index c879f0fc7..2bae0a643 100644
--- a/application/controllers/Lotw.php
+++ b/application/controllers/Lotw.php
@@ -198,6 +198,7 @@ class Lotw extends CI_Controller {
 			echo "You must install php OpenSSL for LoTW functions to work";
 		}
 
+		// set the last run in cron table for the correct cron id
 		$this->load->model('cron_model');
 		$this->cron_model->set_last_run($this->router->class.'_'.$this->router->method);
 
diff --git a/application/controllers/Qrz.php b/application/controllers/Qrz.php
index 3de9c0a3a..2f2ff77f7 100644
--- a/application/controllers/Qrz.php
+++ b/application/controllers/Qrz.php
@@ -69,6 +69,7 @@ class Qrz extends CI_Controller {
 	public function upload() {
 		$this->setOptions();
 
+		// set the last run in cron table for the correct cron id
 		$this->load->model('cron_model');
 		$this->cron_model->set_last_run($this->router->class.'_'.$this->router->method);
 
diff --git a/application/controllers/Update.php b/application/controllers/Update.php
index 9921ce059..d0c4acece 100644
--- a/application/controllers/Update.php
+++ b/application/controllers/Update.php
@@ -180,6 +180,7 @@ class Update extends CI_Controller {
 	// Updates the DXCC & Exceptions from the Club Log Cty.xml file.
 	public function dxcc() {
 
+        // set the last run in cron table for the correct cron id
         $this->load->model('cron_model');
 		$this->cron_model->set_last_run($this->router->class.'_'.$this->router->method);
 
@@ -307,6 +308,7 @@ class Update extends CI_Controller {
 
     public function update_clublog_scp() {
 
+        // set the last run in cron table for the correct cron id
         $this->load->model('cron_model');
 		$this->cron_model->set_last_run($this->router->class.'_'.$this->router->method);
 
@@ -358,6 +360,7 @@ class Update extends CI_Controller {
 
     public function lotw_users() {
 
+        // set the last run in cron table for the correct cron id
         $this->load->model('cron_model');
 		$this->cron_model->set_last_run($this->router->class.'_'.$this->router->method);
 
@@ -419,6 +422,7 @@ class Update extends CI_Controller {
      */
     public function update_dok() {
 
+        // set the last run in cron table for the correct cron id
         $this->load->model('cron_model');
 		$this->cron_model->set_last_run($this->router->class.'_'.$this->router->method);
 
@@ -448,6 +452,7 @@ class Update extends CI_Controller {
      */
     public function update_sota() {
 
+        // set the last run in cron table for the correct cron id
         $this->load->model('cron_model');
 		$this->cron_model->set_last_run($this->router->class.'_'.$this->router->method);
 
@@ -495,6 +500,7 @@ class Update extends CI_Controller {
      */
     public function update_wwff() {
 
+        // set the last run in cron table for the correct cron id
         $this->load->model('cron_model');
 		$this->cron_model->set_last_run($this->router->class.'_'.$this->router->method);
 
@@ -543,6 +549,7 @@ class Update extends CI_Controller {
 
     public function update_pota() {
 
+        // set the last run in cron table for the correct cron id
         $this->load->model('cron_model');
 		$this->cron_model->set_last_run($this->router->class.'_'.$this->router->method);
 
diff --git a/application/models/Cron_model.php b/application/models/Cron_model.php
index 2b55711f7..c616382f3 100644
--- a/application/models/Cron_model.php
+++ b/application/models/Cron_model.php
@@ -2,6 +2,7 @@
 
 class Cron_model extends CI_Model
 {
+	// get all crons from the database
     function get_crons() {
 		$this->db->from('cron');
 
@@ -12,6 +13,7 @@ class Cron_model extends CI_Model
 		return $results;
 	}
 
+	// get details for a specific cron
 	function cron($id) {
 
 		$clean_id = $this->security->xss_clean($id);
@@ -21,6 +23,7 @@ class Cron_model extends CI_Model
 		return $this->db->get('cron');
 	}
 
+	// set the modified timestamp
 	function set_modified($cron) {
 		$data = array(
 			'modified' => date('Y-m-d H:i:s')
@@ -30,6 +33,7 @@ class Cron_model extends CI_Model
 		$this->db->update('cron', $data);
 	}
 
+	// set a new status for the cron
 	function set_status($cron, $status) {
 		$data = array(
 			'status' => $status
@@ -39,6 +43,7 @@ class Cron_model extends CI_Model
 		$this->db->update('cron', $data);
 	}
 
+	// set the last run
 	function set_last_run($cron) {
 		$data = array(
 			'last_run' => date('Y-m-d H:i:s')
@@ -48,6 +53,7 @@ class Cron_model extends CI_Model
 		$this->db->update('cron', $data);
 	}
 
+	// set the calculated next run
 	function set_next_run($cron,$timestamp) {
 		$data = array(
 			'next_run' => $timestamp
@@ -57,6 +63,7 @@ class Cron_model extends CI_Model
 		$this->db->update('cron', $data);
 	}
 
+	// set the cron enabled flag
 	function set_cron_enabled($cron, $cron_enabled) {
 		$data = array (
 			'enabled' => ($cron_enabled === 'true' ? 1 : 0),
@@ -69,6 +76,7 @@ class Cron_model extends CI_Model
 		$this->set_modified($cron);
 	}
 
+	// set the edited details for a cron
 	function edit_cron($id, $description, $expression, $enabled) {
 		
 		$data = array (
diff --git a/application/views/interface_assets/footer.php b/application/views/interface_assets/footer.php
index 471ea7263..0882f62f7 100644
--- a/application/views/interface_assets/footer.php
+++ b/application/views/interface_assets/footer.php
@@ -106,6 +106,7 @@ if($this->session->userdata('user_id') != null) {
     <script src="<?php echo base_url() ;?>assets/js/sections/oqrs.js"></script>
 <?php } ?>
 
+<!-- JS library to convert cron format to human readable -->
 <?php if ($this->uri->segment(1) == "cron") { ?>
     <script src="<?php echo base_url() ;?>assets/js/cronstrue.min.js"async></script>
 <?php } ?>