Udaltax is a free Android app developed by Ayuntamiento de Bilbao - Bilboko Udala in the category of Business & Productivity. It enables users to check the status of their pending and paid receipts, carry out their tax procedures, and make payments and driver identifications quickly and easily.

Udaltax offers two versions - udaltax and udaltax pay. The former requires user authentication and allows users to access the status of their paid and pending receipts, make payments, and obtain payment receipts. The latter version facilitates the payment process by scanning the barcode on the receipt or entering the required information manually. Users can pay via credit card or Bizum and receive payment receipts immediately.

Udaltax also offers a version called udaltax auto, which enables users to identify themselves as drivers via their DNI and pay their traffic fines. However, this version only works for Spanish citizens and does not support identification of legal entities or foreign individuals. Udaltax is a fast, secure, and user-friendly app that is available 24/7, providing a new payment gateway for municipal receipts in Bilbao and driver identification via DNI.