Real Device Testing

Why Device Testing Matters

Over half of e-commerce traffic is mobile. For many stores, it's closer to 70%. But most store owners build and review their site on a laptop — and assume the mobile experience is fine.

It often isn't. A checkout flow that works perfectly on desktop might be completely broken on a phone. Buttons hidden behind sticky headers. Modals that can't be dismissed on small screens. Forms where the submit button is off-screen. Variant selectors too small to tap accurately.

These aren't edge cases. They're the everyday reality of responsive e-commerce — and you'd never know about them unless you actually tested the full journey on a mobile viewport. Not just glanced at it. Actually clicked through every step.

Desktop & Mobile in One Audit

When you run an audit with GhostClick, you can test both desktop and mobile in a single run. Select "Both" in the device settings, and GhostClick runs your full journey twice — once on a desktop viewport (1440x900) and once on a mobile viewport (390x844). Both runs use just 1 audit credit.

Each device gets its own independent report with device-specific findings. If a modal blocks the checkout button only on mobile, you'll see that in the mobile report with a screenshot showing exactly what's happening. The desktop report will show the same step working correctly — making it immediately clear that the issue is device-specific.

This side-by-side visibility is crucial. It tells you not just that something is broken, but where it's broken — so your developer knows exactly what to fix and which viewport to target.

Common Mobile Issues We Find

After thousands of audits, these are the mobile-specific issues that come up again and again:

• Sticky headers covering CTAs — fixed navigation bars or announcement banners that overlap add-to-cart buttons or checkout links when the page scrolls
• Modals that can't be dismissed — newsletter popups, cookie banners, or upsell modals where the close button is outside the visible viewport on small screens
• Horizontal scrolling breaking layouts — content wider than the viewport that causes the entire page to shift and become unusable
• Variant selectors too small to tap — size or color pickers designed for mouse clicks that are frustratingly small on a touchscreen
• Checkout forms that don't fit — form fields, labels, and submit buttons that overflow or overlap on narrow screens, making it impossible to complete a purchase

Every one of these is a customer who wanted to buy from you and couldn't. They don't file a bug report — they just leave.

How Dual-Device Testing Works

GhostClick makes it simple to test both viewports in a single audit. No need to run separate tests or manage two configurations — just select your device preference and the AI handles the rest.

Related

• AI-Powered Checkout Simulation — learn how the AI navigates your store end-to-end
• Detailed Reporting & Replay — see how device-specific findings appear in your audit reports
• Test After Theme Updates — catch responsive regressions every time you update your theme
• Help: Running an Audit — learn how to select device modes when configuring an audit