One-click upsells after checkout, with a timer.

The customer just paid. They're locked in. Two branded post-purchase screens — each with a single complementary offer and a 90-second timer — lift AOV ~18% on average.

Finalising your order…

Payment authorised · order #WM-20403

Why this funnel lifts AOV

One offer per screen. Two offers on one page converts at ~3%. Separating them to two screens lifts acceptance to ~11% + ~7%.
Same-tracking promise. “Added to this shipment” is the killer line — no extra cost, no extra wait.
Timer creates urgency without desperation. 90 seconds is long enough to think, short enough to decide.
No re-enter payment. The card is already authorised — one-click add.

See this in production