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Fogline paints your map passively. You don’t check in, start a trip, or log anything — the phone records where you travel in the background and turns it into painted roads on its own. This is the whole trick: the map fills itself in while you just live your life.

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How a road gets painted

1

The phone records where you go

In the background — app closed, screen off — Fogline notes where you travel, sampling as you move and staying quiet when you’re still.
2

Your path is matched to real roads

Fogline snaps what it recorded onto the actual road network (from OpenStreetMap), so your coverage follows real streets instead of a rough GPS scribble.
3

Each stretch lights up

Roads are divided into short stretches of about 40 metres. Travel one and it flips to painted — permanently. Little by little, your city lights up.
A stretch counts after one pass, in any direction, by any means — driving, walking, cycling, or riding along as a passenger. If you travelled it, it paints.

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What counts (and what doesn’t)

  • Any travel mode paints — car, on foot, bike, bus, passenger. Fogline doesn’t care how you got there, only that you did.
  • Either direction paints — one pass is enough; you don’t have to cover a road both ways.
  • Noise is filtered out — GPS jitter and standing still don’t paint anything, so your map reflects where you actually travelled.

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Where the road network comes from

The roads Fogline paints onto come from OpenStreetMap, bundled into the region pack you download so matching works fully offline. Each pack shows a “data as of” date, and regenerated packs pick up new and changed roads over time (see Offline maps).