This app was mentioned in 1 comment, with an average of 1.00 upvote
Maybe one of these?
https://play.google.com/store/apps/details?id=com.vladster.app.IncoDroid.POS
https://play.google.com/store/apps/details?id=at.smartlab.tshop
https://play.google.com/store/apps/details?id=io.waiter.android
Check the similar apps sections too