Briefle words · UI design
Sticky footer CTA
A main call-to-action button pinned to the bottom of a mobile screen so it's always visible and reachable.
Say it to an AI
Mobile food-delivery cart: item rows with quantity steppers, a subtotal, and checkout. Every minus and plus gets at least a 44px touch target, and checkout is a full-width sticky footer CTA showing the total, down in the thumb zone. Nothing important lives in the header.
How an expert would brief the stronger version of “Mobile cart”.
See it
Try it as a puzzle →Cart screen of a food delivery app, shown at phone width.
Why: B pins a 52px-tall, full-width 'Checkout · $32.40' button to the bottom edge; A only has a small header pill.
Related words
Room 1 · Essentials
Learn “Sticky footer CTA” in a five-minute lesson