EdwardBock

Palasthotel

Have you ever wondered what you WordPress is doing in wp-cron.php? Now you can see it. This plugin logs every schedule.
<h3>Arbitrary section</h3>

Cron Logger

This plugin works but did not cleanup its table and data in options table in my DB.

Leave junks in my DB

Great for troubleshooting

fastcron

This plugin will set up a free cronjob to run your <code>wp-cron.php</code> file automatically. Completely free, no registration required. 
It relies on the free cronjob service provided by <a href="https://www.fastcron.com/?ref=wp" rel="nofollow ugc">FastCron</a>.
Upon activation, it will send your site URL to FastCron, and they will create and run a cronjob every 5 minutes to visit your <code>wp-cron.php</code> file via this URL: 
 https://site-url/wp-cron.php?doing_wp_cron=1
Features: 
– Completely free, no registration required. 
– Simple and fast, just click activate and done. 
– View last 25 execution results on FastCron.
This free plugin is suitable for your personal blog.
If you manage several WordPress blogs/websites for your clients, please <a href="https://app.fastcron.com/signup?ref=wp" rel="nofollow ugc">register an account at FastCron</a> and set up your cronjobs there.
Upon deactivation, the plugin will request FastCron to remove the cronjob to your <code>wp-cron.php</code> file.
By using this plugin, you agree to their <a href="https://www.fastcron.com/about/terms?ref=wp" rel="nofollow ugc">Terms of service</a> and <a href="https://www.fastcron.com/about/privacy?ref=wp" rel="nofollow ugc">Privacy policy</a>.

FastCron – Run WP Cron for free

This plugin will set up a free cronjob at FastCron to run your wp-cron.php file automatically. Completely free, no registration required.

Cron Logger vs FastCron – Run WP Cron for free