A dive shop owner walked me through an ordinary day: a whiteboard, a clipboard, a hand-updated spreadsheet, and a few apps that do not talk to each other. He was paying for it twice, once in software and again in the hours it pulled from his divers.
Most shops run on software nobody built for them. It was made for a back office, and the dock is wet, bright, and in a hurry. Shops keep the whiteboard and the clipboard because paper never crashes, never logs you out, and never needs five taps with wet hands.
DiveDay is built from watching how a boat day runs: fast, clear, and forgiving enough that a crew reaches for it without being told to.