The majority of people who reach your page do it on a phone, often more than two in three. Yet most pages are built and admired on a big laptop screen, where everything looks fine — and then quietly falls apart on the device most people actually use.
Design where they are
- Check every page on your phone before you call it done — that's the real version.
- Make buttons big enough for a thumb and text large enough to read without zoom.
- Keep forms short; typing on a phone is where long forms go to die.
Fast matters more on mobile
Phones are often on slower connections and shorter patience. A page that takes its time loading loses mobile visitors fastest. Light and quick beats rich and slow, every time.
Design for the Thumb, Not the Cursor
A cursor is precise; a thumb is not. Designing mobile-first means every tappable thing is big enough and spaced enough to hit without zooming — a comfortable target is roughly the size of a fingertip, with room around it so people don't fire the wrong link. Buttons and links crammed together on a phone are a constant source of mis-taps and quiet frustration.
Collapse the layout to a single column and let it flow top to bottom. Side-by-side columns that look elegant on a desktop stack awkwardly or shrink to unreadable on a phone. The most important action — usually "buy" or "book" — deserves a button that stays reachable as people scroll, so they never have to hunt back up the page to act.
Assume the thumb reaches from the bottom. Put primary actions within easy reach of the lower half of the screen rather than stranded at the very top, where one-handed users have to shuffle the phone to tap. One booking page moved its "check availability" button from a top banner to a sticky bar at the bottom and saw far more people actually reach it.
The Mobile Checkout Details People Forget
Getting someone to the checkout on mobile is half the battle; the payment step is where clumsy details lose them. Enable the digital wallets phones already carry — Apple Pay and Google Pay turn a page of typing into a single authorised tap, and on mobile that difference is enormous. For many buyers, no wallet means no purchase.
Mind the keyboard. The card-number field should summon the numeric keypad, the email field the email keyboard with the @ key, and every field should accept the phone's autofill rather than fighting it. Most page builders handle this for you, but it's worth checking, because a card field that pops up a full QWERTY keyboard makes people feel the form is broken.
Keep the fields to the minimum a phone user can bear. Typing is slow and error-prone on a small screen, so every field you remove lifts completion. Don't ask for a billing address on a digital product, don't force account creation before payment, and let the wallet fill name and card in one go where it can.
Test on a Real Phone, Not a Resized Window
Shrinking a desktop browser window is not the same as using a phone, and it hides the problems that actually cost sales. A real device has a slower connection, a touch screen, a keyboard that covers half the view, and autofill quirks a resized window never shows. Test on an actual phone, ideally one that isn't the newest model, over mobile data rather than your home wi-fi.
Pay attention to load time as much as layout. A page heavy with large images may open in a blink on your desk and crawl on a phone three bars down, and people leave a slow page long before they see how nicely it's designed. Compress your images, and open the page cold — not from cache — to feel what a first-time visitor feels.
Make the full journey on that phone, from the link someone would actually tap through to a completed purchase. The gap between "looks fine on mobile" and "I just bought it on my phone in twenty seconds" is where half your buyers are decided.