I was looking for a solution myself to run cronjobs, either open source where i could host it a cron job scrip myself or a hosted solution, but most of the options I found was paid hosted cron job services like for example https://www.easycron.com/user/register

I also found a script on codecanyon which is quite is actually quote nice  called “Web CronJobs” which is a self hosted solution.

Neither of these filled what I really wanted through to so kept searching.

But eventually I found this really neat website which I’d like to share called cron-job.org:
https://cron-job.org/en/

They offer you to run unlimited amounts of cron jobs for free. No ads or anything. It just that a free service and it works great. Just register at their website and set up the cron jobs you need.

Cron-job.org also offer to have custom time-outs for each cron job, but it is a premium feature which can be accessed if you sign up as a monthly donator to the project. 

Cheers!