HumidCalc vs Suntime

＊Weather data supported＊ A versatile humidity calculation app for everyone from general users to engineers — also suitable for agricultural applications. This app allows you to easily calculate indicators such as the Discomfort Index, WBGT (estimated heat stress index), Volumetric Absolute Humidity (an important indicator for influenza prevention), and Humidity Deficit (HD) used in agriculture, using weather data. You can also calculate a wide range of air properties from dry-bulb temperature (normal air temperature) and wet-bulb temperature obtained from ventilated psychrometers such as the Assmann psychrometer.
Atmospheric pressure can be entered manually. The app supports 12 indicators across 16 calculation items, and unit conversion between Celsius/Fahrenheit and SI/Imperial units can be performed instantly by switching the temperature unit setting. ■ High-Precision Calculation Engine This app uses the Wexler–Hyland equations combined with numerical analysis, enabling highly accurate and stable calculations across a wide range of environmental conditions. ■ Calculable Indicators * Wet Bulb Temperature * Dew Point Temperature * Frost point temperature * Relative Humidity * Humidity Ratio(Absolute Humidity) * Mass-based absolute humidity * High-resolution mass-based absolute humidity * Volumetric absolute humidity * Humidity Deficit (HD) * Vapor Pressure Deficit (VPD) * Enthalpy * Specific Volume * Saturation Vapor Pressure * Water Vapor Partial Pressure * Boiling Point of Water * WBGT (Estimated value) * Discomfort Index (DI) Supplementary Notes on WBGT & Discomfort Index Outdoor WBGT is defined as: WBGT = 0.7 Tnw + 0.1 Td + 0.2 Tg (°F) Since globe temperature (Tg) is not an input parameter, it is estimated from dry-bulb temperature (Td) using: Tg = 1.45 Td − 27.162 (°F) Td and Tg show a strong correlation (n = 17,376, R² = 0.919). Natural wet-bulb temperature (Tnw) is obtained by converting the measured wet-bulb temperature from an Assmann psychrometer to natural conditions, assuming a wind speed of 98.4 fpm (0.5 m/s) or less. Details of this conversion algorithm are omitted. The Discomfort Index (DI) is calculated as: DI = 0.4 × (Td + Tw) + 15 (°F). ■ Weather Data & Sensors By tapping the Weather Data button, you can obtain current atmospheric pressure, dry-bulb temperature, and wet-bulb temperature. On devices equipped with a barometric pressure sensor, pressing the MEAS button allows direct pressure measurement. Wet-bulb conditions can be set to Normal or Frozen (effective below freezing). Corrected values can also be displayed for non-ventilated psychrometers such as the August psychrometer (ventilated types recommended for accuracy). ■App Ecosystem Integration You can directly receive calculated dry-bulb and wet-bulb temperatures from the companion app “Calculator of Air”. (Please note that calculations must be performed in Calculator of Air before data can be transferred.) By combining HumidCalc with Calculator of Air, you can, for example, derive multiple air properties from known Enthalpy and Humidity Ratio values. ■Input Ranges * Dry-Bulb & Wet-Bulb Temperature: −22°F to 122°F (−30°C to 50°C) * Atmospheric Pressure: 17.72 inHg to 73.09 inHg (600 hPa to 2475 hPa) * Dew Point: −58°F to 122°F (−50°C to 50°C) * Relative Humidity: 0% to 100% (1% steps) ■Notes When using an August psychrometer, calculations assume an air velocity at the sensing element of 98.4 fpm (0.5 m/s) or less. As a result, calculated values may differ from those listed in humidity tables included with commercial August psychrometers. ■Disclaimer 1. Please use values within reasonable temperature ranges (approximately 32°F to 104°F / 0°C to 40°C). Extremely unusual inputs may produce inaccurate results. 2. While every effort has been made to ensure high precision, minor errors may occur due to floating-point limitations. 3. The developer assumes no responsibility for any damages resulting from the use of this app.

Discover the rhythm of sun and moon — for any location in the world, at any time. Suntime shows you at a glance when the sun rises and sets, how long the day is, and where in the sky it currently stands. Add moon phases, moon position, live weather, and — for coastal spots — real tide information. SUN TIMES • Sunrise, solar noon, and sunset • Day length at a glance • Graphical arc showing the sun's path across the sky • Current day progress in percent SUN COMPASS • Azimuth and elevation angle in real time • Arrow points directly toward the sun • Device compass integration (optional) MOON • Moon phase with emoji and name (new moon to full moon) • Illumination percentage • Moonrise and moonset times • Current moon position: azimuth & altitude • Night arc with starry sky background WEATHER • Current temperature and feels-like • Humidity, wind speed and direction • Live weather conditions — no sign-up required TIDES • High and low tide times with exact heights • Tidal range for coastal locations • Requires a free API key from stormglass.io MULTIPLE CITIES • Add and manage as many cities as you like • Quick switching with tabs • City search powered by OpenStreetMap — worldwide PRIVACY BY DESIGN • No registration, no account needed • All data stays on your device • No tracking, no ads, no cookies Available in German, English, French, Portuguese, Dutch — and Hessian dialect Data sources: sunrise-sunset.org · OpenStreetMap Nominatim · Open-Meteo · Stormglass.io