Why mobile access changes data quality
Inventory differences often begin with delayed recording. Someone removes an item in the stock room, writes it on paper, and intends to update the system later. A phone lets the record happen closer to the physical event, while the reason and location are still known.
That advantage depends on speed. If the screen requires too many choices or the team cannot identify the correct product, users will return to memory and notes. Test searching, scanning and quantity entry with the catalog you actually have.
Phone camera or dedicated scanner?
A phone camera can be enough for a small catalog and moderate scan volume. Dedicated hardware can be faster and more durable for continuous warehouse work, damaged codes or long shifts. Salelog uses the camera for supported barcodes; it does not claim to replace every industrial scanning setup.
Scanning identifies an item. It should not reduce inventory until a valid sale or stock operation is completed.
Divide phone and computer work intentionally
Use mobile for activity at the shelf, counter or event. Use the web app when reviewing longer lists or working with a keyboard is easier. Do not assume that a camera-dependent feature or offline behavior works the same in a browser.
For a team, give every person an individual account and only the permissions required by the job. A convenient shared owner password makes access removal and accountability harder later.
Watch synchronization state
Offline-first does not mean every device already sees a local change. A record can be safely stored on one phone while still waiting to reach the server. Pay attention to pending or conflict indicators before switching devices, signing out or treating the operation as fully synchronized.