Thermo Diem

Most weather apps give you numbers. Thermo Diem gives you context. A 72° day after freezing weather can feel completely different from 72° after a heat wave. Thermo Diem compares apparent temperature across time, giving you an immediate answer: How does today feel compared with yesterday? You can also look ahead to tomorrow and explore how upcoming days may feel relative to right now or yesterday’s high. RELATIVE WEATHER AT A GLANCE Thermo Diem translates complex weather data into seven clear shifts: • Much Warmer • Warmer • A Little Warmer • About the Same • A Little Cooler • Cooler • Much Cooler Color-synchronized spectrum gauges make every change easy to understand at a glance. APPARENT TEMPERATURE, EXPLAINED Air temperature is only part of how weather feels. Thermo Diem combines established biometeorological models—including NOAA Wind Chill, the Rothfusz Heat Index, and Steadman-based apparent-temperature calculations—to account for conditions such as: • Humidity and vapor pressure • Wind and convective heat loss • Sunlight and solar exposure • The combined thermal effect on the human body The result is a more useful feels-like temperature, placed in the context of recent and upcoming conditions. TREND CURVES & FUTURE SHIFT See today’s feels-like trajectory alongside yesterday’s curve. Explore the seven-day forecast, select upcoming hours, and compare future conditions with right now, the same time yesterday, or yesterday’s high. BUILT FOR IPHONE DUO Open iPhone Duo to reveal a spacious paired comparison of reference and target conditions. Adaptive layouts support expanded, folded, and tabletop use while preserving your selected day, hour, and comparison. CARPLAY, DYNAMIC ISLAND & LIVE ACTIVITIES Bring relative-weather intelligence into your commute. Thermo Diem displays glanceable temperature shifts, feels-like conditions, and synchronized spectrum gauges across CarPlay, the Lock Screen, and Dynamic Island. HOME & LOCK SCREEN WIDGETS Bring Thermo Diem’s bold poster typography to your Home Screen and Lock Screen. Choose from headline, overview, gauge, commute, and driving-focused layouts. Widgets update throughout the day and can be customized with comparison targets and display options. APPLE WATCH Use the standalone Apple Watch app for fast, independent weather checks. A growing collection of complications supports Corner, Circular, Rectangular, and Inline layouts, with designs optimized for glanceability across different watch faces. NATIONWIDE MOVERS Discover where the country’s biggest temperature shifts are happening. Nationwide Movers highlights major 24-hour changes across diverse climate regions. AVAILABLE IN 4 LANGUAGES Thermo Diem supports English, Spanish, French, and German throughout the app, widgets, and Apple Watch experience. PRIVACY FIRST No advertising networks, behavioral tracking, or data harvesting. Just clear, focused weather intelligence.