The purchase action stayed in view.
Order value moved up.

Keep the next step close to the decision

The challenge

The product page gave shoppers reasons to consider the product, but its purchase controls did not stay with them as they explored. Once the main add-to-cart area moved out of view, a shopper ready to buy had to find their way back. Changing a pack or purchase option created another interruption. Quantity controls sat inside the primary action, while the selector required a return up the page. The existing flow also made the single-unit, one-time option the easiest choice to leave unchanged.

Working hypothesis

Keeping the purchase action visible, while showing the shopper's current selection, could reduce the effort between deciding and adding to cart. A direct route back to the selector could also make it easier to compare larger packs or subscription options. This is the reconstructed rationale for the documented intervention, not a claim that a separate psychological study took place.

What changed

Wavesy added a persistent footer to the product-page journey. Its content reflected the selected price, pack size and one-time or subscription option, so the action remained connected to the customer's current choice. The footer included a Switch Selection control that returned the shopper to the price and pack selector. Quantity changes stayed in that selector instead of inside the add-to-cart button. The source also describes a variant that displayed the switch prompt only while the default pack was selected.

The reported outcome

The original article reports higher order value alongside improved conversion. It attributes the AOV lift to greater adoption of larger packs and subscription, and the CVR lift to the persistent purchase action. The public report does not isolate the contribution of each individual change.

How to interpret the result

The source reports a 30-day observation window, but does not publish the traffic allocation, sample sizes, raw values or confidence calculations. The headline numbers describe the reported result for this implementation. They do not establish that a sticky footer alone produced the same effect across every device or audience.

What another team can learn

A persistent button is most useful when it preserves context. The shopper should know what will be added, how much it costs and how to change it. For a similar test, assess order value and completed purchases together, with checks for accidental clicks, cart errors and mobile obstruction. These are proposed evaluation checks, not additional historical findings.