The 1991 Taxi Doodlaga app, developed by TaxiCaller Nordic AB, is a free Android app that aims to make taxi-hailing more convenient for users in Ulaanbaatar and other cities. The app offers a user-friendly interface that allows users to quickly and easily request a taxi ride from their current location.

With this app, users can view the driver's details, track the driver's location, and receive notifications about the taxi's arrival time. Additionally, users can choose from a variety of payment methods, including cash and credit card.

Overall, the 1991 Taxi Doodlaga app is a useful tool for anyone looking for a safe and reliable way to hail a taxi in Ulaanbaatar. Its intuitive interface and convenient features make it a must-have for frequent taxi riders.