Tool inventory checkout on a jobsite without reliable cell signal

I worked on a jobsite where tool checkout moved to a mobile app, but the basement level had unreliable cell signal. On paper the process was simple: scan the worker badge, scan the tool, and return it at the end of the shift. In practice, the app spun during checkout and people started writing tools on scrap paper again. I looked at scan logs, offline queue behavior, and where tools were actually…