The author’s research delves into how people engage with touchscreen devices, uncovering outdated assumptions. By studying over 1,300 individuals through fieldwork and lab experiments, the author challenges notions like single-handed phone holding and bottom-only taps. The aim is to establish fresh, data-driven standards in lieu of obsolete ones. Touchscreen technologies such as capacitive touch are explored, emphasizing the practical design of touch interfaces aligned with actual user behavior.