Its customized version of Point of sale software its have both online and offline database (you need to add your API to use the online database)
Feature
-> User Authentication
-> Stock List
-> Sell product
-> Sell report
-> Invoice System
-> Bluetooth Printer (To print invoice)
-> Due List
-> Online Data Synchronise System
More details and screenshot about this project https://www.behance.net/gallery/54364123/AndroPos
Google play store link: https://play.google.com/store/apps/details?id=net.a6te.lazycoder.andropos
This project is licensed under the MIT License - see the License File for details