only pay for the test for free.
sends an e-mail for free
I recommend to configure email2sms from your service provider and receive text messages for free.
davonte answered on October 8th 19 at 04:01
As a variant — to take any adequate hosting support cron+php/other monitor and even thousands of sites, the main thing is not beyond the limits offered by the provider. For reliability, you can take a couple of venues, most importantly at different providers.
earl.Predovic answered on October 8th 19 at 04:03
The easiest and free option to put on all of the sites Yandex Metric - there is monitoring, sending email.
I also use the Panel Douglases , there can be, and the income of sites, and the response of the server and sending SMS . All free and the script itself, you need a host only, there the crowns can configure.