Which software do you use to track machine downtimes in the factory?

Hey, we search right now for a solution, where we can monitor machine usage and check eg how often a machine is down per day or stays idle. We‘ve checked some software providers for that - but paying like 150$ per machine per month sounds kind of expensive for me. Which solutions do you use and for how many machines? Ideally this software should also provide an option to receive alerts, if a machine stays idle for too long or should count the parts produced per day.