Lagos, the parts you can actually walk
FOG hides the whole world map and gives it back only where you have walked. Lagos is roughly twenty million people spread over islands and mainland, and it was not built for pedestrians, so the map you end up with is honest about that.
The shape of the place
Lagos is a lagoon city at sea level, and geography does most of the organising. Lagos Island holds the old commercial core, with the Marina along the water, Broad Street behind it, and the Balogun and Idumota market streets packed in tight. East of it, across a short causeway, is Ikoyi, low-density, tree-lined and quiet by Lagos standards. South of Ikoyi is Victoria Island, then the Lekki peninsula, which is essentially one long strip of land threaded by the Lekki-Epe Expressway.
The mainland is a different animal: Yaba, Surulere, Ikeja, Mushin, Apapa, and it is much bigger than the islands. The bridges that connect the two, Third Mainland, Eko and Carter, are motorways. You do not walk them.
It is flat. Completely flat. There is no elevation to make anything interesting or difficult. What makes it difficult is everything else.
Where walking actually works
Three places reward it. The first is the Lekki-Ikoyi Link Bridge, which has a proper pedestrian walkway and is used by runners at dawn. Crossing it and back is a clean, safe, satisfying couple of kilometres over the water.
The second is Ikoyi. The streets are wide, the traffic is lighter, there is shade, and you can string together a long loop through Bourdillon, Glover, Kingsway and the streets around them without fighting anybody. It is the closest Lagos gets to pleasant urban walking.
The third is Lagos Island itself, and here you walk because nothing else moves. The market grid around Balogun is impassable to vehicles for most of the day, so the fastest way through is on foot. Start at Freedom Park on Broad Street, walk the Marina, cut north through the market streets to Idumota, then back along Nnamdi Azikiwe. It is short in distance and long in time, and it clears a dense knot of streets you could not reach any other way.
Why the fog stays thick here
This is worth saying plainly. Lagos is a hard city to fill in on foot and you should not expect a bright continuous field. What you get is a scatter: a lit knot on Lagos Island, a lit patch in Ikoyi, a bright line over the link bridge, maybe a run of Victoria Island streets, and a lot of dark between them.
The reasons are structural. Continuous sidewalks are the exception rather than the rule. Open drainage channels run along many roadsides. Expressways cut the metro into pieces with no pedestrian crossings for long stretches. And you will often be crossing between areas by car because that is simply how the city works, which reveals nothing.
Set expectations accordingly. The city percent for Lagos will be very small for a very long time. That is not the app being stingy. That is Lagos.
Heat, rain and time of day
It is hot and humid year round with no real relief. The rainy season runs roughly April to October and it rains hard, with July usually the worst of it. Streets flood quickly and drainage is uneven, which closes routes without notice.
Early morning is the walking window. Runners are out on the link bridge and in Ikoyi before six, the air is as cool as it gets, and the traffic has not seized up yet. Evenings work in the quieter districts.
Victoria Island's newer towers can make GPS drift a little, but most of Lagos is low enough that signal is not the problem.
FOG keeps revealing with the app closed and the screen off, so the phone stays in a pocket. There is no account, no cloud and no tracking, and the map never leaves the device.
How the map works
The entire world starts under fog. Every street you physically walk is revealed permanently, and it works the same anywhere on Earth, for walking, running or riding.
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Questions people actually ask
Can you really walk Lagos?
In parts. Ikoyi, Lagos Island's market streets and the Lekki-Ikoyi Link Bridge walkway are genuinely walkable. Much of the rest of the metro has no continuous footpath.
Does driving across Third Mainland Bridge reveal it?
No. Only ground you physically cover under your own power is revealed. Car and bus journeys clear nothing.
Will my Lagos percentage look terrible?
Almost certainly, and that is accurate. Lagos is enormous and pedestrian infrastructure is patchy, so the lit area stays a scatter of patches for a long time.
Is my location data sent anywhere?
No. No account, no sign-up, no cloud, no analytics, no ads and no tracking. The map stays on the phone and you can export it yourself.
Start with a dark map.
FOG is free to explore. No account, no subscription, and your map never leaves your phone.
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