GreenRah is a heat-smart walking map for hotter cities. Instead of sending you only on the fastest path, it compares sun, shade, weather, slope, and thermal comfort to help you choose a cooler, gentler walk. See shade ahead, compare route comfort, find drinking water and public toilets, and choose accessible paths with easier slopes. Built for commuters, visitors, families, older adults, and anyone who feels city heat first. Starting in EU and GB.