Walk Stockholm and clear it island by island
The whole map starts under fog. In Stockholm it comes off in pieces, because the city is pieces: fourteen islands with water between all of them.
A city assembled from islands
Stockholm sits where Lake Malaren meets the Baltic, and the city is spread across the islands in between. Gamla Stan is the medieval original: a tight oval of lanes, some of them barely shoulder width, wrapped around the palace and the old square. Everything else grew outward in a different style. Norrmalm and Ostermalm are nineteenth century block plans with wide streets, and Strandvagen along the water is as close to a Parisian boulevard as the north gets.
Sodermalm is the odd one. It is a lump of rock, so its northern edge is a cliff with the city laid out on top, reached by stairs, ramps and the Katarina lift. The walk along Monteliusvagen and Fjallgatan runs right on that edge. Kungsholmen and Djurgarden are flatter and greener.
A route that uses the bridges properly
Start on Skeppsbron with the water on your left, thread the lanes of Gamla Stan up to Stortorget, then come out at the south end and cross Slussen onto Sodermalm. Climb to the cliff path, follow it west along Monteliusvagen for the view back over the whole old town, then drop down and walk Hornsgatan into the Sofo streets.
For length, the loop around Kungsholmen is roughly ten kilometres of almost continuous waterside path, and it draws a beautiful closed circle on the map. Djurgarden is the other easy win: a whole island of parkland and paths, reached over Djurgardsbron, that fills in quickly because you can keep walking without a single road crossing.
Water shapes the whole map
Cleared ground in Stockholm never spreads evenly. It grows to the edge of an island and stops, hard, at the water. Then a bridge takes you across and a new patch starts. After a few weeks the map looks like what it is: separate lit shapes joined by narrow threads at Vasterbron, Skeppsbron, Djurgardsbron and the rest.
That makes progress unusually legible. You can see exactly which island you have finished and which one you have only touched at the ferry landing. It also means the walking has real constraints. A building three hundred metres away across a channel can be a two kilometre walk to reach, and there is no way to cheat it. The upside is that individual islands are small enough to genuinely complete.
Winter is the real variable
Summer in Stockholm is close to ideal. Light until very late, mild, and the waterside paths stay usable well into the evening. Winter is the opposite argument: dark by mid afternoon in December, and the cliff stairs on Sodermalm ice over. The city grits and clears, but the walking season is genuinely shorter here than further south, and that shows up in how fast your percentage moves.
The narrow lanes of Gamla Stan can nudge the position a little between tall old walls. Elsewhere the buildings are low enough that the trace stays clean. Background exploring keeps recording with the app closed and the screen off, which matters when you are walking in gloves.
Free to explore. One purchase of USD 5.99 unlocks unlimited ranks, every character and history import, with no subscription.
Questions people actually ask
Does crossing by ferry reveal anything?
Only the ground you actually cover. FOG reveals what you move over, so a ferry hop leaves the island itself dark until you walk it.
Can I finish a whole island?
Sodermalm or Kungsholmen are realistic targets. City percent tells you how much of Stockholm as a whole you have lit.
Will winter break the tracking?
No. Cold does not affect what gets revealed. It affects how much you feel like walking.
Do I need to sign up?
No. No account, no cloud, no ads, no analytics. The map never leaves your phone, and you can export your data.
Start with a dark map.
FOG is free to explore. No account, no subscription, and your map never leaves your phone.
free to explore · one purchase unlocks everything · never a subscription