I've been looking for a 'Grafana for personal metrics' (eg. weight, personal finance, etc.). Does anything like this exist? Ideally very simple, stripped-down metrics/observability w/ ability to input data in UI or via API.
You may want to look into https://exist.io/. It's a very indie developer duo out of Australia (IIRC). And also IIRC they were looking for a buyer on Twitter some time ago.