The short answer: an inventory app for a real small business must capture scans, counts and photos with no connection at all, then sync itself when the signal returns. Not "works on slow wifi" - works in airplane mode. If a vendor's offline story is a tier upgrade or a footnote, the tool will fail you exactly where your stock actually lives.
The geography problem
Think about where counting happens: the basement storeroom under the shop, the back of a van in an underground garage, the venue floor before doors, the container at the back of the yard. Steel shelving is a Faraday cage; concrete doesn't care about your carrier. The desk has perfect wifi - and none of your stock.
This is why clipboard-and-retype refuses to die: paper works offline. Any app that doesn't is competing with paper and losing.
What "offline-first" actually means
In ItemTally's mobile app, the phone keeps its own copy of your register. Scans resolve against it, counts are recorded in it, adjustments queue in an ordered outbox. When the connection returns, the outbox drains to the server in order and the register catches up - no "retry?" dialogs, no lost work. It's the same design your email's outbox has used for thirty years, applied to stock.
The part that keeps it honest: every offline action becomes a normal movement in the same append-only ledger, attributed to the person and the device. An offline count isn't a second-class guess - it's the record.
Questions to ask any vendor (including us)
Is offline on every plan? (Ours: yes, including free - gating offline to premium tiers means your cheapest crew member can't count the basement.) Can I scan-to-find offline? (Yes - the local copy resolves codes.) What happens to conflicting edits? (The ledger absorbs them as ordered movements with authors, so nothing silently overwrites.) Does the free tier sync-limit? (No.)
The pattern to avoid is easy to spot on any pricing page: if "offline mode" appears in a paid tier's feature list, the vendor thinks of it as a luxury. It's not. It's whether the tool works in the rooms your stuff is in.