If you want to make inventory, import your csv file with list of goods. Wich format must be :
1 col - barcode, 2 - goods name, 3 - goods quantity , 4 goods cost 1, 5 goods cost 2, 6 your id of goods or custom field
Like on Example
When import will finish, open tab scan allow access to the camera
and start scanning the goods.
If scanned barcode of product is in database a window will open, in which you fill in the available fields,
quantity, product name, or two types of prices, otherwise, if the barcode is not found, new product entry will be available.
You can take an inventory or enter the goods into the sales invoice from several devices at the same time,
this greatly speeds up the process.
How to make csv
A comma-separated values (CSV) file is a delimited text file that uses a comma to separate values.
Each line of the file is a data record. Each record consists of one or more fields, separated by commas.
The use of the comma as a field separator is the source of the name for this file format.
A CSV file typically stores tabular data (numbers and text) in plain text, in which case each line will have the same number of fields.
More on .... Wikipedia
Make with drive google;
If you have price list or list of goods in Excel format, you can convert this to csv, and add or delete desired columns.
Then download csv and import it in app.