What A/B tests, AOV and AI‑search studies actually found.

The effect “is contingent on the magnitude of the quantity specified in the offer and the rate of product consumption”, and it measured intentions, not orders. Drechsler and colleagues found “X for $Y” did better than “X + N free”, and that quantity requirements of four to five units showed the largest effects, in functional categories but not hedonic ones. BulkPilot’s tiers are 2 and 3 units; quantity 4 and above continues at the Buy 3 rate.

When a shopper adds the pot and the card to the plant, or takes three instead of one, the order is bigger and one pick-and-ship is spread over more revenue. In a McKinsey retail case, shoppers judged a two-item bundle on its one total price.

• BundlePilot: shoppers build the bundle themselves and see one total.
• BulkPilot: Buy 2 and Buy 3 prices next to Add to cart.

Peer-reviewedDrechsler et al., European Journal of Marketing (opens the source) Consulting firmMcKinsey, “Dynamic pricing in retail” (opens the source)

That is one reason on Baymard’s list. Overall, 70.22% of online carts are abandoned, on average across 50 studies, and most abandonment has causes no app fixes, such as shoppers who were only browsing. Baymard also estimates that $260 billion of lost US and EU orders are recoverable through better checkout design. That covers every checkout fix it has documented, so it is context for this lever, not a figure for any one app.

Two of the reasons shoppers leave are ones these apps work on: not seeing the total until checkout, and leaving checkout to hunt for a code.

• BulkPilot: the quantity price shows before checkout and applies automatically, with no code.
• BundlePilot: the bundle total and the saving show on the product page, in the cart and on the order.

Independent researchBaymard, “Payment UX” (opens the source)

McKinsey found that getting the depth, timing and choice of discounts right can improve margin rates by 400 to 800 basis points.

Price falls straight to profit: McKinsey calculated that a 5% price cut needs 18.7% more volume just to break even.

• SalePilot: the end time is enforced and every price goes back, with a report of what reverted.

Consulting firmMcKinsey, “The power of pricing” (opens the source)