Tasks, four ways
Floating, fixed-calendar, one-off and condition-driven (triggered) tasks — model any kind of upkeep, from filter changes to "renew the passport".
Native Home Assistant surfaces
Used through a to-do list, an upcoming-tasks calendar, per-device button / next-due / overdue entities, and a bundled dashboard card.
Appliances & inventory
Give "dumb" appliances a real device page with metadata, parts & wear items, spare-part stock, and a CSV appliance report for insurance.
Events & automations
A bus event for every meaningful change plus visual-editor device triggers like "Task became overdue", and a service for every data action.
What people say
From the Home Assistant community forum and GitHub issues.
It's exceptionally well thought out, fills a real gap in the Home Assistant ecosystem, and has great potential to become the go-to maintenance tracker for many users.
So happy to finally see such a thorough solution to this problem. I hope this really takes off and becomes a core component of HA.
It is currently much closer to the maintenance tracker I had been looking for than anything else I tried.