Felsius is a weather application designed to show both Celsius and Fahrenheit temperature readings at the same time. Its main purpose is to eliminate the need for users to manually convert between temperature units or toggle settings, providing immediate understanding of weather conditions in both measurement systems.

The app features simultaneous display of °C and °F, allowing users to see both temperature scales without any switching required. It supports saving multiple locations for quick access to weather information across different areas. Felsius includes widgets for convenient home screen access and maintains a minimal design philosophy with no advertisements.

Felsius works by presenting temperature data in dual units that are always visible together. This approach eliminates the mental math typically required when converting between Celsius and Fahrenheit, providing instant clarity at a glance.

The primary benefit is instant clarity for temperature understanding without conversion efforts. Use cases include daily weather checking for expats, travelers, and households where members use different temperature measurement systems.

The target users are expats, travelers, and mixed-unit households who need to understand weather temperatures in both Celsius and Fahrenheit formats. The app is designed specifically for people who regularly encounter both temperature measurement systems.