Flux adds real-time haptic feedback to your entire Windows experience. Every button, link, slider, and tab you hover over or click, you feel it through your Logitech MX Master 4's haptic motor. It detects UI elements across every app at 100Hz, with different waveforms for hover enter, hover exit, link hover, and click, all customizable. 7-day free trial, no account needed. $2.99/month with rent-to-buy.