During January 2025, Frederic Wagner enhanced the Pushups module in the sheerun/BangleApps repository by implementing theme color support and theme-based UI styling. He focused on enabling customizable background and foreground colors, applying theme colors to display, menu, and duration-related UI elements, and ensuring consistent text color adaptation. Using JavaScript and drawing on his embedded and front-end development skills, Frederic centralized theming logic to improve visual adaptability, accessibility, and branding consistency. His work established a foundation for future theming expansion across the application, with clear, traceable commits and a focus on maintainable, scalable UI development rather than bug fixes.