Created this based on a request from my wife as we lost track when last, the Bambu Printers was serviced - we have a few 
This integration will track the usage hours and you can then track and get a reminder.
Current reminder / notification is via a persistent notification, however there is a binary sensor that can be tracked for other custom notification automations.
With a “Reset Service” button when the service has been completed
Now the initial use case was for the Bambu Printer, but a variety of things water filter hours, pump hours - if hours don’t work you can use days alone a metric to track service and get reminders.
As many scheduled as needed can be create on a single source, to break down sub-services like filter changes, full service, etc…