Operator is the first app I built in this series, and it’s an absolute workhorse. Running 24/7, it handles millions of face and hand samples, plus some of the most complex datasets—like physical therapy exercises recorded in gyms and studios from the US to China. It’s built in C# WPF, structured with JSON and MVVM, ensuring everything stays efficient and scalable. And here’s the kicker: Operator supports up to 5 cameras simultaneously—including RealSense and RGB cameras—so data collection is faster, richer, and more precise. When working at this scale, you need something that just works—and Operator delivers.