10/13/2026
Being mobile responsive solves the layout problem. The text scales. The buttons stack. The page fits on a small screen. That's genuinely useful but also genuinely not enough.
What being responsive doesn't do is account for the person holding the phone. Mobile users are often moving, distracted, and trying to do one specific thing quickly. The most important actions need to be reachable with one thumb. Sessions get interrupted and need to be resumable. Users rarely want to do everything the product offers. They just want to do one thing and they want to do it fast.
A desktop interface that reflows to 390px wide hasn't been designed for any of this. It's been tolerated on a smaller screen.
The questions worth asking when designing for mobile aren't about viewport widths. They're about moments. What is this user trying to do? Where are they when they're doing it? What gets in the way? Those answers build a different product than a responsive stylesheet.
Get in touch if you want to talk through your mobile experience.