Hi, I developed similar app for one inventory in UK, using app we scan products bar code and send data to server using API.
We will need API to send data to server database and from there it can be used in excel file.
I have expertise in such app development and in native Android app development overall.
Please send me message, that app is for internal use, so I will send you video record or screenshots over chat,
I am really interested in working on it with you,
Thanks,
Swapnil Chouhan