I downloaded several inventory tracking apps when I was trying to set up an inventory management program for my company using a socket mobile 2D Bluetooth scanner. This program is by far the best I have tried in apps or pc software. I have downloaded it to an iPhone and an iPad and it integrates flawlessly. The layout is very simple and intuitive but allows customization to your business needs (shipping, receiving, selling, fixed assets, etc.)
When using this program with a remote scanner the speed and ease of use is just incredible. In the last three days I have put 1,163 items into the software. Each item can be modified in a number of ways and you can put notes on individual items and track them by category, location, etc. once your inventory management program is up and running you can back up to iCloud or you can export spread sheets by email and store them as backups or load them on google drive for company access.
I could not be happier with my purchase!