An open-source mobile weather app built with React Native and Expo. DualTemp displays every temperature in both Celsius and Fahrenheit at once, so there's no switching units in settings or converting in your head. Designed for people who live between the two scales, with hourly and multi-day forecasts in a clean, glanceable layout, backed by a Node.js + Express weather proxy with Redis caching. Published on Google Play and the App Store, with over 10,000 downloads across Android and iOS.