MyExplore

A personal "fog of war" map for your iPhone. As you walk or drive with the app open (foreground or background), it reveals the city as a honeycomb of explored hexagons. Single user, no account, no network — all data lives in a local SQLite file on your phone.

How it works

Piece	File	What it does
App entry	Sources/MyExploreApp.swift	SwiftUI app
Map UI	Sources/ContentView.swift, Sources/MapView.swift	MapKit map + explored hexagons + stats bar
Tracking	Sources/LocationManager.swift	CoreLocation, foreground + background updates
Grid math	Sources/HexGrid.swift	lat/lng → hexagon (~100 m), and back to drawable corners
Storage	Sources/Database.swift	SQLite: visited_hex + raw track_point breadcrumbs

Each GPS fix is snapped to a hexagon (pointy-top grid over a Web Mercator projection, ~100 m across). New hexagons are inserted; revisits bump a counter. The map draws all explored hexagons as one translucent overlay.

Install on your iPhone

1. Open the project:

   open MyExplore.xcodeproj
   

   (If you ever change project.yml, regenerate with xcodegen generate.)
2. Select the MyExplore target → Signing & Capabilities → pick your Apple Developer Team. The bundle id is net.cloudaid.myexplore (change it if needed).
3. Plug in your iPhone, select it as the run destination, press ▶ Run.
4. On the phone, allow location — choose Always so it keeps tracking in the background. The blue status bar means it's recording.

With your paid developer account the signature lasts a year, so install once.

Tuning

• Hexagon size: HexGrid.size (currently 75 Mercator meters ≈ 100 m across). Smaller = finer detail, more tiles.
• GPS sensitivity: LocationManager distanceFilter (meters between fixes) and desiredAccuracy.

Your data

A plain SQLite file at Application Support/explore.sqlite inside the app's container. visited_hex is the map; track_point keeps raw breadcrumbs so you could re-grid later at a different size.