Looking to see if there are users that are or have developed interfaces using the Church Metrics API.
The only thing I've seen is this one https://wordpress.org/plugins/church-metrics-dashboard/ though I haven't tried it myself. I think there are quite a few churches that develop against the API but haven't see much that has been open sourced unfortunately.
I'm using the API to extract data for our analytics platform. I've thought about extending the UI, doing some custom data entry pages, nothing has come of those thoughts yet.