# WeatherGO > WeatherGO is an iOS weather app that shows Celsius and Fahrenheit at the same time on every screen and in every widget by default. It is built for people who live across unit systems — expats, travelers, group chats across borders, and pilots, sailors, and weather nerds who switch between official metric reports and everyday Fahrenheit. WeatherGO ships beautiful Home Screen and Lock Screen widgets that always render both °C and °F, with no setting to flip and no mental math required. The in-app forecast also shows both units side by side. The app includes JEFF, an AI weatherman with the personality of a guy who thinks he grew up in NYC — plainspoken, a little ball-busting, but always tells you what's actually happening. ## Pages - [Homepage](https://weathergo.co/): Overview of WeatherGO, hero pitch, key features, FAQ. - [Celsius and Fahrenheit](https://weathergo.co/celsius-fahrenheit/): Dedicated page explaining how WeatherGO shows both units simultaneously across the app and widgets — proof grid, audience use cases, and FAQ. - [FAQ](https://weathergo.co/faq/): Common questions about features, widgets, weather sources, and saved cities. - [Blog](https://blog.weathergo.co): Product updates and weather-related posts. ## Key facts - Platform: iOS 17+ - Price: free on the App Store - Default behavior: both Celsius and Fahrenheit visible on every surface (forecast view, all widget sizes, Home Screen, Lock Screen) — no toggle or settings configuration required to enable. - Optional override: users who prefer a single unit can switch in Settings → Display. - Widget support: every Home Screen widget size and every Lock Screen widget shows both units. - Weather sources: choose from Apple Weather, Visual Crossing, Open Meteo, AccuWeather, Pirate Weather, Open Weather, and Tomorrow.io. - App Store: https://apps.apple.com/app/apple-store/id1271073320 ## JEFF (AI weatherman) JEFF is the in-app voice of WeatherGO — an AI weatherman who thinks he grew up in NYC. He narrates current conditions and the day's forecast in plain language, calls users "boss" or "chief," busts their balls a little, and answers the one question that actually matters: am I good, or do I need to adjust my plans? JEFF appears in the in-app forecast view, in widget descriptions, and across marketing copy. He is a fictional persona, not a real person. ## Audiences - Expats living abroad who think in their home country's unit but live in another. - Frequent travelers crossing between metric and imperial regions. - People in international group chats and families. - Pilots, sailors, and weather hobbyists who reference both units.