Log it on site with no signal; it syncs itself the moment you’re back online.
Sites are exactly where the signal dies — a basement slab, a plot on the edge of town. An app that needs internet to record a delivery is an app that gets abandoned for the register.
TameerBook is an offline-first progressive web app. Mark attendance, record a wage advance or a payment with zero signal; each entry is held safely and synced when the phone reconnects.