Introduction
A responsive layout is not automatically a good mobile experience.
Many websites technically fit on a phone while still being difficult to navigate, read or convert through.
Mobile UX problems are especially damaging for local and service businesses because visitors may be trying to call, book or request help quickly.
These are ten mistakes I would check first.
1. The Desktop Header Was Simply Shrunk
Desktop navigation often contains too many links for a small screen.
Create a mobile menu with clear grouping and easy tap targets.
Do not force tiny text or horizontal scrolling simply to preserve the desktop arrangement.
The mobile header should prioritize the actions that matter most.
2. Text Is Too Small
Visitors should not need to pinch-zoom to read normal body copy.
Use a comfortable base font size, sensible line length and enough contrast.
Large headings should also scale appropriately rather than wrapping into awkward five-line blocks.
Read the page on a real phone at normal viewing distance.
3. Buttons Are Difficult to Tap
Small icons and tightly packed links increase accidental taps.
Give important buttons enough size and spacing.
This matters especially for phone, WhatsApp, menu and checkout actions.
WCAG 2.2 also added a minimum target-size success criterion at Level AA, reinforcing the importance of usable touch targets.
4. Sticky Elements Cover Content
A cookie banner, chat bubble, sticky header and bottom CTA can consume a large percentage of a mobile viewport.
Test these elements together rather than individually.
Critical buttons, form fields or navigation should not be hidden behind overlays.
Remove or reduce elements that add little value.
5. Forms Use Desktop Thinking
Long side-by-side fields often collapse poorly on narrow screens.
Use one-column forms where practical and choose appropriate mobile input types.
Keep labels visible and error messages close to the field.
Test the form while the mobile keyboard is open.
6. Large Images Load Before Useful Content
Mobile users may be on slower networks.
Optimize hero media, provide responsive image sizes and avoid downloading large decorative assets that do not improve the decision.
A beautiful image is not useful if it delays the page's main message and CTA.
Performance is part of mobile UX.
7. Hover-Only Interactions
Touchscreens do not behave like desktop pointers.
Important navigation, tooltips or controls should not depend on hover alone.
If an interaction reveals necessary information, provide a touch-friendly alternative.
Test menus and cards directly on touch devices.
8. Tables and Comparisons Overflow
Pricing tables and feature comparisons can become unreadable when squeezed into narrow columns.
Consider stacked cards, horizontal scrolling with clear affordances or a simplified mobile view.
Do not shrink text to preserve a desktop table.
The information hierarchy should adapt to the screen.
9. Popups Interrupt Too Early
An immediate full-screen promotion or newsletter popup can block the visitor before they understand the page.
On mobile, this can feel especially aggressive.
Use interruptions sparingly and make dismiss controls easy to find and tap.
Do not let a popup become the most memorable part of the website.
10. Nobody Tests the Real Conversion Journey
Design reviews often check individual screens without completing the actual task.
Call the business, submit the form, open WhatsApp, choose a product, use the menu and complete checkout on a phone.
Small issues become obvious when you behave like a real visitor.
Make mobile journey testing part of every release.
Frequently Asked Questions
What is the difference between responsive design and mobile UX? — Responsive design adapts layout dimensions; mobile UX also considers touch, speed, input, navigation and real user tasks.
Should mobile pages have less content? — Not automatically. Prioritize and structure content so important information is easy to consume on smaller screens.
Are sticky buttons good on mobile? — They can be useful if they do not obscure content or compete with other overlays.
How should I test mobile UX? — Use real phones and complete the actual conversion journeys, not only visual checks.