There is one button I look for when I reach an online checkout:

When it is there, I confirm the card and details already on my device, authenticate and move on. Without it, the store wants my name, address and card details in another form. Sometimes it also wants an account and the privilege of storing my card.

No. I wanted the thing in the cart, not a clerical relationship with your database.

The shortest path gets the order

Apple Pay is close enough to one click to change my behaviour. The merchant receives the delivery details I authorise, but I do not have to re-enter them. It also receives a device-specific account number and a transaction-specific security code instead of my actual card number. That is the documented design, not a comforting little shield icon beside a conventional card form.

This is not merely my impatience. In Baymard’s current cart-abandonment research, 17% of shoppers had recently abandoned an order because checkout was too long or complicated; 19% had left because they did not trust the site with their card information. In a controlled experiment, Stripe measured a 22.3% average increase in conversion when Apple Pay was offered. It is the provider’s dataset, but the direction is unsurprising.

Browser autofill is not equivalent. It can fail or fill the wrong field, and I still inspect a form before submitting my card number. Nor will I let every shop keep a card on file. Roughly once a year, an unauthorised transaction forces me to replace my card and repair everything attached to it. More card-on-file relationships assign me more trust and maintenance.

This is one reason I rarely buy from Core Electronics now unless it is the only place with the part. Little Bird Electronics usually gets the order. The products are often interchangeable; the checkout is not.

You lose more than one cart

Cart-abandonment statistics capture only the first-order damage. I may finish an inconvenient checkout once because I have already chosen the product. What I learn is to begin elsewhere next time. The original merchant never sees that lost cart because I never return far enough to create it.

Losing one purchase is trivial. Training a frequent buyer to exclude your store can redirect years of orders to a competitor.

A monopoly can get away with this. If you are the only seller with the item, I will suffer through the form. Most shops are not monopolies. When another seller has the same item at a similar price, checkout is part of the product and the faster seller wins.

The excuse is usually gone

A custom payment stack can require merchant setup, domain verification and testing. That is not the ordinary excuse for a shop using a modern provider or hosted checkout. Apple tells merchants to contact their payment provider. With Stripe’s hosted Checkout, Apple Pay needs no integration change and can be enabled in payment-method settings.

There is no special Apple toll either. Stripe charges the same as it does for the underlying card transaction. Apple Pay does not remove the ordinary card-processing fee; it does not add another. If the checkout supports it, the remaining work may literally be turning it on.

So turn it on. Do not make a willing customer transcribe information, expose a card number or establish an account merely to give you money. They may tolerate it today. The consequential decision is where they shop first next time.