The Integrated Transport System is a public transport system serving the city of Bratislava and the surrounding region in Slovakia. The service is free to use and is provided by the city and the region through the official mobile application of the Integrated Transport System. The app allows you to buy tickets for all modes of public transport, including train, bus, and tram. 

You can use the application to find out more information about the public transport system in Bratislava and to buy your tickets. You can do this in two ways.

The first way is to go to the homepage of the app and choose your preferred mode of public transport. Then, you will be able to see all available tickets for the current date. You can buy your ticket for any of the available modes of public transport in Bratislava. You will be able to see the exact price of your ticket and the number of passengers who will be traveling with you. You can buy the ticket for as many passengers as you want. The second way is to go to the ticketing page of the app and choose the mode of public transport that you want to travel in. Then, you will be able to see the available tickets for the current date.