How Offline Maps Work

Offline maps work by storing map data directly on your device instead of streaming it from a server. When you download a map region, the app saves roads, place names, points of interest and routing data locally. From that moment, showing the map, searching for places and calculating routes no longer needs an internet connection.

This is different from the temporary caching that online map apps do. A cache only keeps tiles you have recently viewed, at the zoom levels you viewed them; a true offline map contains the complete data for a region, including everything needed for search and routing.

What is stored on the device

A downloaded region typically includes:

• The visual map: roads, buildings, terrain, labels.
• A searchable index of places, streets and addresses.
• A routing graph, so the app can calculate directions between two points.

Because all three parts are local, an offline maps app like Pino can search places, plan routes and give turn-by-turn directions with no signal at all.

What still needs internet

Downloading and updating map regions requires a connection. Anything inherently live — traffic conditions, business opening-hours changes made yesterday, online reviews — is not part of offline map data. Positioning, however, does not need internet: GPS works independently, which is covered in Does GPS work without internet?

How Pino uses offline maps

Pino is built offline-first for Android and Wear OS (with iPhone coming soon). You choose a region, see its download size before committing, and download it over Wi-Fi or mobile data. After that, map display, place search, route calculation and turn-by-turn navigation all run on the device — on your phone, or standalone on a Wear OS watch. See How to download maps for the steps.