Fog of World

Review by eFreeware

Most travel apps ask you to log where you went. Fog of World does the opposite: it starts with the whole planet hidden under fog and clears it wherever you go. The idea borrows from the fog of war in strategy games, and the developer has been applying it to real maps since 2012. You record your movement, and the map gradually reveals the paths you have taken.

That framing is what makes it interesting. A conventional tracker gives you a list of trips; this one gives you a picture of your coverage, with the unexplored parts still hidden. If you like the thought of watching that picture fill in over months and years, the concept is likely to appeal.

It is a paid app at $29.99, with no ads and no in-app purchases, so the whole proposition rests on whether you want this particular view of your travels. I would think of it as a long-term record rather than something you dip into for a single vacation.

A fit for long-term travelers and map obsessives

The people I would expect to get the most from Fog of World are those who move around a lot and care about the shape of that movement. Long-distance drivers, cyclists who cover the same routes repeatedly, and anyone who travels between regions for work will accumulate a map worth looking at. The appeal grows with the ground you cover.

It also suits the type of person who enjoys completion for its own sake. The app tracks visit percentages for each continent and hands out badges as you explore, which turns ordinary journeys into progress. If you have ever finished a game map just to see it finished, that instinct transfers neatly here.

The flip side is that a map clears slowly. Someone who mostly stays within one city will see a small patch of color and a great deal of fog, and the satisfaction depends on being comfortable with that pace. The app is built for accumulation, and the more ground you cover, the more it has to show you.

Recording and mapping your movement

The core of the app is track recording. It logs your routes and draws them onto the world map, and the developer says recording continues while the app is running in the background, so you do not have to keep it open in front of you. Trips are mapped and stored in your cloud storage.

You can also bring in tracks from elsewhere. GPX and KML files can be imported, which means routes captured by other tools can be folded into the same map. For anyone who has years of recorded rides or hikes sitting in files, that import path is the difference between starting from zero and starting with a history.

The map itself is the centerpiece. The developer describes the fog rendering as the best available and points out that the app shows high-resolution tracks, with thickness that changes smoothly as you zoom. Those are marketing claims, and I would treat the comparison with rival apps as the developer's own view rather than a settled fact. What is plain is that the fog overlay and the drawn tracks are the two things the app is organized around.

Statistics, badges and the geocoding database

Beyond the map, Fog of World breaks your coverage down by world, continent, country and territory. These figures update as you travel, giving you a numeric counterpart to the visual one. The app uses an offline reverse geocoding database for this, which the developer describes as highly accurate; it is the component that decides which country or region a given point belongs to.

Badges provide the other layer of motivation, rewarding exploration as your coverage widens. They are a familiar device, but they fit the fog premise well: the map shows you what is left, and the badges give you something to aim at along the way.

One technical detail worth mentioning is coordinate systems. China uses the GCJ-02 system, and the app handles both China and the rest of the world correctly. For anyone who travels in that part of the world, that is a meaningful point of difference from simpler trackers.

Your data, syncing and the track editor

There is no user account. All data is saved on your device, with syncing or backup available to Dropbox, Google Drive, OneDrive and Nutstore, accessible only to you. Sync is there for backup and for moving between devices rather than for building a social profile.

The most recent addition is a track editor, which lets you correct recorded routes by hand. Three uses are listed: fixing wandering paths caused by signal interference in cities, adding tracks that were missed in tunnels and on subways, and erasing inaccurate points left by GPS drift. You reach it through Settings, then Database, then Track Editor.

That editor addresses the most common complaint about any GPS-based record: the line does not always match the journey. Being able to tidy the map without discarding the trip is a sensible addition, and it fits an app whose whole value is the accuracy of the picture it builds.

What the $29.99 buys

Fog of World is a one-time purchase of $29.99. That is a straightforward arrangement and unusual among travel apps, many of which are free to install and then charge for features or remove advertising.

The price does mean the decision comes before you have seen the map fill in. You are judging the idea itself: whether a fog-covered world map that clears as you travel is something you want to keep for years. For an app designed around long-term accumulation, that is a reasonable way to sell it, but it does ask for commitment up front.

The install base is modest, at over 10,000, and the average rating sits at 3.5 from 604 ratings. Those numbers describe a niche product with a settled audience rather than a broadly popular one, which is consistent with a paid app built around a single strong idea.

How it compares with the alternatives

The obvious comparison is with free fitness and route-tracking apps. Those record where you went and show it on a map, often with pace, elevation and heart-rate data attached. What they generally do not do is maintain a persistent fog layer over the entire world that only clears where you have been. If the fog is the part that interests you, the alternatives do not really substitute for it.

Another option is a dedicated travel journal or photo map, where the record is built from places you mark or pictures you take. That approach is lighter on effort but also less continuous; it captures the trips you choose to note rather than the ground you actually covered. Fog of World sits closer to automatic recording, with the map as the artifact.

Then there is the question of cost against free tools. A free tracker costs nothing to try, while this one asks $29.99 before you see anything. The trade is between a lower-risk experiment and a specific, unusual feature set that the free options do not offer. Which side of that you land on depends on how much the fog idea itself appeals to you.

A niche tool that rewards patience

I would recommend Fog of World to people who travel widely and enjoy seeing that travel accumulate into something visual. The combination of automatic background recording, an import path for existing GPX and KML tracks, statistics down to country level, and a fog layer that clears as you go gives it a clear identity. The track editor is a welcome addition for anyone who has watched a recorded line wander off the road.

It is not an app for someone who wants quick results or a broad set of travel tools. The map clears slowly, the price is paid up front, and the whole experience is built around the long view. If that premise sounds satisfying rather than tedious, the app is likely to hold your interest; if not, the fog will simply sit there.

The modest install numbers and 3.5 rating suggest a product with a devoted but limited following. For the right traveler, though, that narrowness is part of the appeal: it does one thing, and it does it in a way that few other apps attempt.

What's new in version 3.7.4

(Build 1475) INTRODUCING THE TRACK EDITOR! Now you can manually edit your recorded tracks to perfect your map. • Correct wandering paths caused by signal interference in cities. • Add missing tracks from tunnels & subways. • Erase inaccurate points from GPS drift. To enter editing mode, go to: Settings > Database > Track Editor