SlotSure

SlotSure is a mobile + web app that monitors grocery delivery slots across multiple retailers and alerts you the moment a workable time opens up. Instead of forcing users to refresh apps for hours, it runs background checks, learns your acceptable windows (e.g., weekdays after 6pm, weekends 9–11am), and can auto-reserve a slot when available (where retailer flows allow) or deep-link you directly to checkout with the slot preselected. It also tracks recurring needs (milk, diapers, pet food) and reminds you to book before you run out, but it does not try to replace the retailer cart—its job is getting you a slot reliably. Realistically, this wins only if it’s faster and more reliable than manual refreshing and if it supports the top retailers in each region with stable integrations.