Personal Cloudwatch
Personal Cloudwatch is a private tool for the owner of connected cloud accounts. It checks storage usage and, when the owner selects a folder, aggregate file counts and sizes. It records a private health summary so the owner can see whether a connection needs attention.
For Google Drive, the app requests read-only access to file metadata. It cannot download file contents or change files. The monitoring service runs on the owner's Hetzner server; this public page is informational and does not display account data.