A free program for Android, by arara.

QRQR is an Android application that helps you to create and read QR codes and to scan them on your phone or tablet. It is free, easy to use, and it has a user-friendly interface. It is compatible with Android devices running on Android 4.0 and above.

You can create QR codes in a variety of formats and with a variety of purposes. You can use them to link to websites, to download apps, to register for websites, to buy products and to find out more information. You can also use them to send messages and to share pictures and videos.

QRQR allows you to create QR codes in a variety of formats. It supports both portrait and landscape mode and it is compatible with both smartphones and tablets.