Plausible seems like a fine choice for simple cases. It is oriented at websites, but you can send events directly to the API: https://plausible.io/docs/events-a

Plausible seems like a fine choice for simple cases. It is oriented at websites, but you can send events directly to the API: https://plausible.io/docs/events-api https://plausible.io/docs/events-api It is self-hostable, too. https://github.com/plausible/hosting https://github.com/plausible/hosting