Public transport is free for tourists in Bern if you are staying overnight. There is a Bern Welcome App you can download and you activate it with a code from your hotel (the room reservation number in my case) It covers all local trains, trams, and buses and will get you to the Wankdorf Stadium. Every little helps with the beer prices. There is also one in Geneva if you are coming from there. My hotel there sent me a link.
You can scroll down on this link
Its central location in the heart of Europe and excellent national and international connections make Bern easy to reach from anywhere in the world. The extensive public transport network connects all parts of the city, and thanks to Bern’s manageable size, you can go almost anywhere on foot.
www.bern.com