It “looks fine on my phone” (but breaks on theirs)

Whenever I raise a mobile problem with a business owner, I get the same reply: “It looks fine on my phone.” And they’re not lying. On their phone, in their hand, the site probably does look fine.

But their phone is one device. One screen size, one browser, one set of cached files, held by the one person who built or bought the site. Their visitors are on hundreds of different devices — and for a sizeable share of them, the site is somewhere between awkward and unusable.

This is the “looks fine on my phone” trap, and it’s why so many business owners don’t realise their website has a mobile problem until someone tells them — usually a frustrated customer, or a designer like me.

Why “fine on my phone” doesn’t mean fine

Several things make your experience of your own site unrepresentative:

• Your phone is a recent model. A big, fast, modern screen. Plenty of your visitors are on older, smaller, slower phones where the same site behaves very differently.
• You’ve cached it. You visit your own site often, so it loads instantly for you. First-time visitors download it fresh — which can take far longer.
• One screen size isn’t all sizes. Your phone is one width. A site that fits a large phone can overflow, wrap badly or push buttons off-screen on a smaller one.
• Different browsers render differently. Safari, Chrome, Samsung Internet and others can all show the same page slightly differently — sometimes very differently.
• You know where everything is. You don’t have to hunt, because you designed it. A first-time visitor’s experience is nothing like yours.

The things that break quietly

Mobile breakage is rarely dramatic. It’s small, death-by-a-thousand-cuts stuff:

• Tiny tap targets. Buttons so small you have to zoom and pinch to hit them — if you can be bothered.
• Horizontal scrolling. Something’s too wide, so the whole page drifts sideways. Instantly feels broken.
• Text you have to pinch to read. If the font’s too small and doesn’t scale, most people won’t strain to read it.
• Forms that fight you. Fields that bring up the wrong keyboard, or submit when you meant to tab.
• Pop-ups you can’t close. A banner whose “X” is off-screen, trapping the visitor behind it.
• Slowmobile load. Big images and heavy code that fly in on fibre but crawl on a phone on the move.

None of these show up when you glance at your own site. All of them quietly send visitors away.

How to actually test it

Stop trusting your own phone. Do these instead:

1. Borrow other phones. Ask a friend with a different (ideally older, smaller) phone to open your site and try to contact you. Watch over their shoulder. It’s eye-opening.
2. Use your browser’s device tools. Every modern browser can preview a site at different device widths. Cycle through a few.
3. Test on a slow connection. Throttle your network and see how long the site takes to appear on a poor signal.
4. Try to complete one task. Don’t just look — try to find your phone number and call it, or find a service and submit an enquiry, on someone else’s phone.

Why it matters more than ever

Two reasons mobile can’t be an afterthought:

• Most of your visitors are on mobile. For UK small business sites it’s typically 60–75% of traffic. A broken mobile experience loses most of your audience.
• Google ranks mobile-first. Google looks at the mobile version of your site to decide where to rank you. If it’s poor, you’re harder to find in the first place.

The fix

Proper responsive design — a site that genuinely reshapes itself for every screen, with touch-sized targets, readable text, fast loading and forms that work — isn’t a nice-to-have. It’s the baseline. If your site was built years ago and “looks fine on your phone”, it’s very likely failing on plenty of other phones you’ll never see.

The simplest way to know for sure: see what a genuinely mobile-first version of your site looks like. Browse the responsive sites we’ve built, or get a free homepage demo and check it on a few different phones.