Stay Cool is shade-aware pedestrian navigation — a free web map and iOS app that picks the cooler side of every street using real building heights and live sun position. Live in 39 cities.
Three taps. One walk. Same physics, smaller phone.
Tap anywhere on the map or paste an address. We use the same coordinates your messaging app does — no special format.
Now, in an hour, after lunch. The sun keeps moving — Stay Cool moves with it. Scrub the time slider until the shade lines up with your day.
Step-by-step directions that hug the cool side. If a side switches halfway, we tell you to cross at the next light — same as a friend would.
The same idea as the routing engine — sun position + building geometry — looped through one block of West 23rd. Drag the slider; watch the shaded side switch.
Want to try this on your block in Columbus?
Open the live demo→NO ACCOUNT REQUIRED · RUNS IN YOUR BROWSERShort essays, dispatches, and field notes from the cities we map.
The sun has already shifted since you started reading. Pick up where it left off.
Routing works anywhere OpenStreetMap reaches — most of the walkable world. Filled dots are cities we've gone deeper on, modelling every building's height so the shade switches block by block; the list grows week by week, often by request. The shaded side is wherever it's night, right now.