How do you get email notification based on simple rules, monitoring based on data?

Hello, How do you get email notification based on simple rules, monitoring based on data?

I have an application with clicks and attributed clicks. clicks and attributed clicks should be the same 90% of the time. For some clients, it's normal that it was lower, for others this means there is a problem.

I'm looking for a solution where I can setup a global rule like attributed clicks should be minimum 90% of clicks, if it's not the case notify me on slack or by email.

I know I can code it into my code but I would prefer an external solution similar of uprobot but for this use case.

Regards