Here you can download the apps for Paperang Bluetooth Thermal Printer

For Paperang P1S printers and Android devices only
⇒ Download: Chinese version APK (ver. 3.0.6)
Password: lnspaperang
The Chinese version allows different printing paper (sticker labels, etc) to be selected from the app. App instruction/interface is all in Chinese.

For computers operating on Windows only. No instructions included but the usage is pretty straight-forward.
⇒ Download: Windows version
Password: lnspaperang