Fog-of-war map app that tracks places you've explored
Problem
People want a visual record of everywhere they've actually been — a map that starts blacked out and progressively reveals territory as you visit it, videogame-style, at street level rather than whole cities. Existing tracking apps (Google Timeline) show raw location history but not the playful 'exploration progress' view that motivates people to discover new areas.
Opportunity
A mobile app that builds a personal fog-of-war map from GPS traces (privacy-first, on-device), with stats like % of a city explored, streaks and shareable maps — gamified local exploration with a strong viral/word-of-mouth angle.
Market analysis
This exact app exists several times over: Fog of World has done it since 2012, and WanderMap, FOG, and WanderHue are active recent competitors with the same privacy-first on-device pitch. The recurring Reddit threads asking for it prove demand but also prove discoverability of incumbents is poor — the gap is marketing reach, not product.
Market · Urban explorers, runners, citywalkers, and travelers; the niche is proven and keeps generating organic demand threads.
Pricing · Freemium with a one-time or subscription unlock; competitors range from free (WanderMap) to paid apps, anchoring low willingness to pay.
Pros
- + Proven emotional appeal; the shareable map screenshot is organic marketing.
- + On-device GPS processing is a genuine privacy story people care about.
- + Streaks and percent-explored stats drive real habit retention.
Cons
- − Established incumbents: Fog of World since 2012, plus WanderMap, FOG, WanderHue.
- − Free competitors anchor willingness to pay near zero.
- − Background GPS is battery-hostile and platform-fragile (iOS/Android restrictions).
Existing / similar tools
Source
r/Doesthisexist (Reddit)
That people keep asking for this on Reddit while four apps already exist is the actual finding: incumbents win on features but lose on distribution, and the winner of this category will be decided by a viral moment, not by another feature list. The one strategic weakness shared by all incumbents is data gravity — years of accumulated GPS history lock users in and freeze the market — so the only credible attack is a great import path from Fog of World and Google Timeline, converting the incumbents’ own moat into an acquisition channel. Two hard truths cap the ceiling regardless: this is a hobby-scale niche, not a venture-scale market, and continuous background GPS collides with increasingly aggressive OS battery restrictions, which is an erosion problem every player shares.