Google Maps offline: how to use it abroad

Offline maps are free; you pay in storage and in the time it takes to download. A single city box is usually a few hundred megabytes. A large region or a whole country can run to several gigabytes, which matters on a 64 GB phone that is already full of photos. Check free space before you start and delete old areas you no longer need.

Download time depends on the connection. On good hotel Wi-Fi a city takes a few minutes; a country-sized area can take much longer and may be better done at home. If you are on a metered mobile plan, do not start a large download on cellular data.

The other cost is data you avoid. Running the map offline means no roaming charges for map tiles, which is the point. You will still want some data for transit, messages and bookings, so a local eSIM or a small roaming bundle is worth having alongside the offline map, not instead of it.

Inside a downloaded area you get the base map, place names, your saved lists and pins, and directions for driving and walking between two points. Search works for places that were in the map data when you downloaded it. That is enough for the core travel jobs: getting from a station to a hotel, finding a pharmacy, showing a taxi driver a pin.

What fails is anything that needs a live answer. Transit directions and timetables need a connection. Live traffic and rerouting around jams need a connection. Opening hours, prices, reviews and photos are fetched fresh, so they may be missing or stale. Ride-hailing and food delivery apps are separate apps and need data regardless.

There is a middle ground worth knowing. If you have a local SIM with a small data allowance, keep data on but turn off background app refresh, and let Maps fetch transit only when you ask. Many travellers run the map offline for walking and switch data on for a single transit query at the station.

The most common mistake is downloading too small a box. People draw a tight rectangle around the city centre, then land at an airport outside it, or take a day trip past the edge, and the map goes blank exactly when they need it. Draw generously, and add a second box for the airport and for any day trip.

The second mistake is trusting a download you never tested. A download that stalled at 40 percent looks saved in the list but has holes. Open it in airplane mode before you rely on it.

The third is forgetting that offline areas expire. Google refreshes them periodically, and an area you downloaded long ago and never opened can lapse. Before a trip, reopen the app on Wi-Fi and let it update the areas you plan to use. If you are heading somewhere for months, refresh before you leave reliable Wi-Fi.

Other gaps to plan around: offline maps do not cover transit, so a city with no walking option needs a second app or a paper plan. They do not help with ride-hailing. They do not translate. And on a phone with two SIMs, check which one is set for data before you assume you are offline; a background sync can quietly use roaming data.

Carry a second offline map app. OpenStreetMap-based apps and other map apps store their own offline data, and having two independent copies means a failed download or a wiped cache does not strand you. Download the same city in both before you go.

Carry the address in writing. A screenshot of the hotel name and address in the local script, plus a pin, solves the taxi and the front-desk conversation when your phone is dead or the driver does not read Latin script. Paper is fine; a photo in your camera roll is fine.

Carry power. Offline maps drain the battery faster than you expect because the GPS radio runs continuously. A power bank and a charging cable matter more than any app setting. If you are navigating on foot all day, keep the phone in airplane mode between checks and turn the screen brightness down.

Finally, tell someone your plan. If you are walking a long route or driving somewhere remote, a shared location or a message to a friend is the backup that works when the phone does not.