Martin Jenssen enhanced the AtB-AS/mittatb-app repository by improving the readability and consistency of payment method labels in the user interface. He focused on updating the display strings for Apple Pay and Google Pay, ensuring that payment options appeared in a more human-friendly format aligned with the app’s design guidelines. Using TypeScript and front end development skills, Martin mapped default labels to display ‘Apple Pay’ instead of the previous uppercase format, reducing potential user confusion. His work included clear, descriptive commit messages and traceable changes, reflecting careful attention to code hygiene and documentation throughout the targeted UI and text enhancement.