QR Master is a free utility tool application developed by Odin Interactive for Android devices. It allows users to scan QR codes through any available camera on the device and preview and edit the result. Additionally, users can encrypt text into a QR code and save it in the device's memory.

The app offers a simple and user-friendly interface. To scan a QR code, users can point the selected camera on the code or select a picture from the gallery. The result obtained is not opened immediately in the internet browser, but is displayed in the preview field where it can be edited, opened in the browser, or saved in the device's memory. This feature allows users to encrypt not only internet links, but also any other text such as a phone number or email.

To encrypt text and create a QR code, users can enter the text in the appropriate field, and after generating the code, it can be saved in the device's memory in PNG format or scanned to other devices. Overall, QR Master is a useful app for those who need to scan and create QR codes on their Android devices.