Walk Ho Chi Minh City, one district at a time
FOG buries the world map in fog and only lifts it where you have physically walked. Saigon is huge and low, so the honest approach here is to pick a district and finish it rather than chase a city percentage.
A colonial grid inside a very large city
District 1 is the part that walks well. The French laid a broad grid over it, so Dong Khoi, Le Loi, Nam Ky Khoi Nghia and Le Duan run straight and cross at right angles, with the Notre Dame Cathedral, the Central Post Office and the Opera House sitting on that frame. Nguyen Hue is a proper pedestrian street, wide and paved, running from the People's Committee building down to the river. Ben Thanh Market anchors the western end. This is the flattest, clearest, most legible square kilometre in the city and it is where your first walks should go.
Outside that, the pattern loosens fast. District 3 keeps some of the grid and adds trees. District 5, the old Chinese quarter of Cholon, is a much denser and more chaotic weave around Binh Tay Market. District 4 is a compact peninsula of narrow lanes. Binh Thanh and Phu Nhuan spread north and are stitched together by alleys rather than streets. Across the river, Thu Thiem is new, wide and half empty, reachable on foot over the Ba Son bridge.
An afternoon in District 1
Start at Ben Thanh Market and walk Le Loi east to the Opera House. Turn down Dong Khoi to the river, then follow the Saigon riverfront north to the Ba Son bridge and walk out over the water. Come back and take Nguyen Hue the full length of the pedestrian street, then cut north on Pasteur or Nam Ky Khoi Nghia to the cathedral and the Independence Palace, and finish through the park on Le Duan.
That is maybe seven or eight kilometres and it clears the core of District 1 in one go. Do it early in the morning or after dark. In the middle of the afternoon you will lose an hour to shade hunting and it will not be enjoyable.
The heat, the hem, and the honest limits
Two things make Saigon harder on foot than it looks on a map. The first is that the sidewalks are usually full of parked motorbikes, kitchens and tables, so you walk in the road at the kerb and cross by moving slowly and steadily while the traffic flows around you. The second is heat. It is hot and humid every month of the year, and from around May to November the afternoon rain arrives hard and fast. Walking here is a morning and evening activity, and pretending otherwise leads to a short trip.
The alleys, the hem, are where the city actually lives, and walking them fills in territory that no visitor normally touches. They are narrow with tall buildings both sides, so the GPS can drift a little in there and your track through an alley network will look softer than the same distance along Le Loi.
Set expectations on scale. The city is enormous and mostly low rise, so a city percentage will move very slowly no matter how much you walk. District by district is the satisfying way to play it: clear District 1, then Cholon, then District 4.
The app itself
FOG is a fog of war walking map. The whole world starts under fog and every street you physically walk is revealed permanently. Ranks climb with area covered: Wanderer, Scout, Pathfinder, Explorer, Voyager. City percent shows how much of any city you have walked you have lit up, and the collection counts 241 countries, 3,390 regions and 7,342 named places, all earned by standing in them.
No account, no sign up, no cloud, no analytics, no ads, no tracking. The map never leaves the phone, and you can export your data. Background exploring keeps revealing with the app closed and the screen off, which is the right way to carry a phone here. Free to explore, and one purchase of USD 5.99 unlocks unlimited ranks, every character and history import from Google Timeline exports and GPX files. No subscription.
Questions people actually ask
Why does my city percentage barely move here?
Ho Chi Minh City is very large and mostly low rise, so the denominator is enormous. Clearing one district at a time is the more satisfying goal.
Do the alleys track properly?
Mostly. Narrow lanes with tall buildings on both sides can make the GPS drift, so alley tracks look softer than tracks along the main boulevards.
When should I actually walk?
Early morning or after dark. It is hot and humid year round, and from about May to November the afternoons bring heavy rain.
Does the app need to stay open while I walk?
No. Background exploring keeps revealing the map with the app closed and the screen off.
Can I add trips I already took in Vietnam?
Yes, with the paid unlock. History import reads Google Timeline exports and GPX files.
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