Tools
Calculators and maps, not gizmos.
SI first. Educational disclaimers where the data is live. No third-party weather branding. Search lives in the header — it is not a fifth product card.
Earth-motion calculator
3D Earth, terminator, date and latitude to noon altitude, day length, declination, and season. Dual-place compare. Tilt 23.44° or 0°. Presets from Reykjavík to Ushuaia.
Live weather
Click or drag a pin; compare a second place. Open-Meteo temperature, wind, gusts, rain, humidity, cloud, pressure, visibility. 72-hour chart. Educational and delayed.
World map studio
Readable world map. Relief, rivers, settlements, three colours of plate boundary, Köppen samples, measure in km, overlay opacity. OpenFreeMap, then OSM, then Natural Earth.
Atlas
World countries, UK nations, US states. Landscape photograph, capital, coordinates, two or three physical sentences, related labs, climate and tectonic filters, compare two places.