At the end of the financial year, many businesses have to count everything they hold. In Germany, § 240 of the Commercial Code (HGB) requires merchants to draw up an inventory at the end of each financial year, and other countries have similar rules for their annual accounts.
The count usually happens on one or two days, with extra helpers, count sheets and a long evening of typing the results into a spreadsheet. Handwriting gets misread, sheets go missing, and numbers are typed twice or not at all.
If each counter records the barcode and quantity directly on a phone, the typing step disappears. What is left is planning the zones, counting, and combining the files.