Mobile-first vs mobile-friendly
Most landing pages are mobile-friendly (they don't break on small screens) but desktop-first (the mobile version is a stripped-down adaptation). The result: mobile visitors get a worse hierarchy, harder-to-tap CTAs, and copy that was edited for desktop reading patterns. Mobile-first reverses this — design the mobile experience, then expand for desktop.
The conversion gap
Across our analyzed pages, mobile conversion rates average 30–50% lower than desktop. Most of that gap is unforced: form fields too small, CTAs hidden below long hero blocks, navigation menus that obscure the page, or videos that autoplay on cellular data. Each one costs conversions; together they compound.
What to test on real devices
Browser-resize testing misses real-device problems: thumb reach, touch precision, keyboard behavior on input focus, viewport behavior with software keyboards. Test on at least one iPhone and one mid-tier Android. Run mobile-specific analysis to catch the issues that desktop testing won't surface.