What I have in mind (for iPad) :
Take photo of an item in store/warehouse/anywhere using this app. This photo will automatically be cropped to 200 x 200 size.
Along with this photo, there will be other options for data input, such as description, unit, quantities, price, etc. Pretty much like how you input a new contact number.
When this is done and saved, there will be a corresponding spreadsheet with corresponding file name automatically created, with the photos, descriptions, units, etc etc in readily tabulated format.
Attached is a sample of what I have in mind. Please respond ASAP if you are able to do this, the estimated cost and duration.