On a phone, a product page is long: photos, description, specifications, reviews. By the time shoppers are convinced, the Add to cart button is far above. Some scroll back up; many do not.
What a sticky add to cart bar does
It shows a slim bar, at the bottom or top of the screen, as soon as the real Add to cart button leaves the view. The bar repeats the essentials: product photo, name, price and the button.
What to look for
- Appears only when needed, not on top of the real button.
- Handles variable products: it follows the chosen variation, or brings the shopper back to the options if none is selected.
- Uses the real WooCommerce form, so validation and AJAX add to cart keep working.
- Respects mobile details: the iPhone home bar area and reduced-motion settings.
- Light: it should not slow down your product pages.
Setting it up
Install Stickyline, choose bottom or top, phones and/or desktop, light or dark, and your button colour. Then open a product page on your phone and scroll. You can try it on the live demo.
Measure the effect
Compare your mobile add-to-cart rate before and after over a few weeks, with similar traffic. Every store is different, so your own numbers are the ones that matter.
Keep improving your product pages
Add a size guide for clothing, an honest countdown for sales, and read our WooCommerce conversion tips.
Why mobile product pages lose sales
On a phone, a typical product page is long: gallery, title, price, variations, description, reviews and related products. Once the visitor scrolls past the price, the add to cart button disappears. To buy, they must scroll back up, find the right options and tap the button. Each extra step loses a few customers. A sticky bar removes that step by keeping the price and the button within thumb reach at all times.
Design tips
- Keep it slim: one line with a thumbnail, the product name, the price and the button. It should never cover more than a small part of the screen.
- Show it only after the main button scrolls out of view, so the two buttons are never visible at the same time.
- Match your theme colours, with a button colour that contrasts with the rest of the page.
- Handle variations: if a size or colour must be chosen, the button should let visitors pick it or scroll them to the selector, never fail silently.
- Avoid conflicts with other fixed elements such as chat buttons or cookie banners.
Pair it with clear information
A sticky button converts better when the visitor has the information they need. Make sure delivery costs, delivery times and the return policy are visible on the product page. For clothing, a visible size guide answers the main doubt. A free shipping bar can also encourage visitors to add a second item.
Performance
A sticky bar should be lightweight: a few kilobytes of CSS and JavaScript, loaded only on product pages. Check your page speed before and after installing it. See it in action on the Stickyline demo (open it on your phone) and read more WooCommerce conversion tips.
Frequently asked questions
Will the sticky bar cover my content?
It only appears once the real Add to cart button is out of view, and it respects the iPhone home bar area.
Does it work with variable products?
Yes. It follows the chosen variation, or brings shoppers back to the options if none is selected.
Can I show it only on mobile?
Yes. You can choose phones, desktop or both.