1. Use an app with real offline transit data
The single biggest upgrade is an app that stores core transit data, not just cached map images. CityNav includes major transit lines and key stations for 28 cities, keeping downloaded maps, station information and supported route planning available offline. Live departures and disruption updates require a connection.
2. GPS works without data — use it
A little-known fact: GPS reception does not itself use mobile data. With downloaded map and route data, your phone may continue showing location without roaming. New map tiles, route calculations and live results require connectivity, so save guidance before setting off.
3. Plan the day's routes on Wi-Fi
Each morning on hotel Wi-Fi, look up and save your day's journeys. Previously downloaded maps, station information, saved routes and saved guidance can remain available offline. For anything else — restaurant bookings or opening hours — save a copy as well.
4. Know your emergency info before you need it
If something goes wrong with no signal, you don't want to be searching for the local emergency number. CityNav's Safety Centre pages — emergency numbers, tourist police, hospitals and common scams for all 28 cities — are available offline once you've opened the app.
5. What still needs a connection (and how to cope)
- Live disruptions — check on Wi-Fi before leaving; metro stations increasingly have free Wi-Fi for a quick refresh.
- Ride-hailing — needs data; agree taxi fares up front instead, or use station taxi ranks.
- Translation — download an offline language pack before you fly.
Prepare for weak signal before you travel
Open CityNav on Wi-Fi and save the maps, routes and guidance you expect to need. Live services require internet.
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Frequently Asked Questions
Can I navigate a city without any internet connection?
Yes. With CityNav data downloaded in advance, core transit maps, station information and supported route guidance remain available offline. Live information and communication features require a connection.
Does GPS use mobile data?
No. GPS is received directly from satellites and works with mobile data switched off, and even in airplane mode on most phones (re-enable location services). You can always see your position on an offline map.
Does Google Maps work without internet?
Partially. You must download offline areas in advance, and offline transit directions may be limited. CityNav keeps its downloaded transit maps, station information and supported core route guidance available offline; live information requires internet.
How do I check metro routes underground with no signal?
Open or save CityNav guidance before entering the station. Downloaded transit maps, scheduled information and supported route guidance remain available underground, while live departures and disruption updates require a connection.
What should I prepare before travelling to avoid needing data?
Open CityNav on Wi-Fi and save the maps, routes and guidance you expect to need. Also download an offline translation pack, save bookings and addresses, and note your accommodation address on paper as a backup.