For Cron Online to be the only thing firing your scheduled tasks (no double-firing, no surprises), you need to disable WordPress's built-in WP-Cron on your site.
wp-config.phpOpen wp-config.php in your WordPress install root and add this line above the
/* That's all, stop editing! */ comment:
Save the file. If you edited it locally, upload it to your server. No restart needed.
Your site now relies on us for cron triggering. We're already pinging it on the schedule you picked.
This acknowledgement is for your peace of mind only — we don't store it. We can't verify it from the outside.
What if I don't disable WP-Cron?
Your scheduled tasks will fire twice — once when a visitor hits the site, once when we ping. Usually harmless, but resource-wasteful and occasionally race-condition-y.
Can I undo this?
Yes. Remove the line from wp-config.php and WordPress goes back to running cron on page visits.
My host doesn't let me edit wp-config.php.
Some shared hosts restrict this. If you can't edit it, leave WP-Cron enabled — Cron Online's pings just become redundant rather than required. Pinging still works.