Cronjob or CRON is an important tool to perform automated / schedule task for web application.
Some shared hosting company may limit (or completely disable) the cron service functionality leading to some web application unable to perform periodic / automated task.
Luckily there’s website such as Cron-Job.org which offers free cron-job to those who aren’t able to obtain one.
The best thing about Cron-Job.org service, is they allow minute-by-minute cronjob execution for free!
Bonus: The folks at Cron-Job also releases the source code behind the service at GitHub!