We have other two APPs,
A. Distribution and retail management solution : https://play.google.com/store/apps/details?id=com.oscprofessionals.businessassist_gst
B. Distribution solution for Business and sales team : https://play.google.com/store/apps/details?id=com.oscprofessionals.sales_pos
The application is nice but I would like to know if you can create users as a store clerk etc and if it can work in different points and devices if it generates payment vouchers

– Sales Assist is offline and powerful order based application.

But as your need is multiple user create and used in different devices, So you can check our another application Business assist – Distribution and retail management app.
https://play.google.com/store/apps/details?id=com.oscprofessionals.businessassist_gst