What is One-Click Buy?

One-click buy is a streamlined purchase button that skips cart and checkout—order completes instantly using saved payment and shipping info. Popularized by Amazon (patent expired 2017). Reduces friction for returning customers, increases impulse purchases. Requires logged-in user with saved payment.

When Should You Use This?

Best for repeat purchase businesses (books, consumables, digital goods). Less useful for first-time buyers or complex products requiring customization. Risk: Accidental clicks. Always use confirmation modal ("Buy now for $49.99?"). Requires robust payment infrastructure (Stripe, PayPal).

Common Mistakes to Avoid

• •No confirmation modal—users accidentally buy, increases refunds
• •Showing for non-logged-in users—button should only appear if payment saved
• •No order confirmation—redirect to order page, send email immediately
• •Unclear vs "Add to Cart"—use different styling, clear copy like "Buy Now"

Real-World Examples

• •Amazon—"Buy Now" button next to "Add to Cart", uses saved default address/payment
• •Digital products—instant download after one-click purchase (e-books, courses)
• •Subscriptions—one-click renewal for monthly consumables (coffee, supplements)