Tax TUB is a free Android application developed by the General Department of Taxation Mongolia. It falls under the Utilities & Tools category and offers a QR code scanner and step tracker.

The app's interface is simple and user-friendly. It allows users to scan QR codes and view specific information about them. Additionally, the app registers a log of all the QR codes scanned. The step tracking feature monitors walking steps on a daily, weekly, and monthly basis. It provides a clear overview of the steps taken, the distance covered, and the calories burned.

Overall, Tax TUB is a useful application for those looking to track their daily physical activity and scan QR codes. The app is free to use and offers an accessible way to keep track of your daily activity.