Client Usage Tracking Tool

I need a lightweight tool that lets me see, at a glance, how often each client actually uses my service. The core requirement is simple: every time a client interacts with the platform I want that event stored, timestamped, and tied back to their account so I can monitor frequency over time... (Budget: ₹750 - ₹1250 INR, Jobs: API Development, Database Management, JavaScript, MySQL, Node.js, PHP, Python, Software Architecture)