I've been using TelemetryDeck's beta on my personal app (RPGen) for quite a while now, and it's been a great way for me to get a quick glimpse of my usage analytics. I wanted something lightweight (ideally just hitting an endpoint) without needing to bring in a huge plugin/package. They have plugins for a number of stacks, but being able to use HTTP requests is honestly the best. When I was running into a problem setting it up, their founder was more than happy to help me, and their Slack channel is always active.
I'm very excited to have finally found a great lightweight (and privacy concerned!) analytics package, big thank you to the devs <3 If you need anything from at-a-glance insights to customizable groupings, TelemetryDeck is a great tool to use.