Privacy

What City Guide 3D keeps, and why

Last updated: 1 November 2026

You can use every city without an account, and then almost nothing about you leaves your device. An account is optional: it keeps the things you choose to save, so you have them on every device. Here's all of it, in plain words.

Without an account

City Guide 3D keeps a few things in your browser's own storage, on your device only. They never leave it:

your preferences: miles or kilometres, walking pace, 12- or 24-hour clock, currency and graphics;
whether you last looked at a city by day, at sunset or at night, and whether street view's sound is on;
your pin in each city (the spot or address you looked up), so it's there when you come back;
how much 3D your device can handle, so the map starts on the right graphics next time.

To clear them, take your pin off the map (its ✕), or clear this site's data in your browser's settings.

With an account

An account is free and optional. You sign in with Google, or with an email address and a password. Accounts are run by Google's Firebase Authentication: your password goes straight to it, and City Guide 3D never sees or keeps it.

Your account holds:

Who you are: your email address, and the name you give when you sign up (if you give one). If you sign in with Google, Google shares your name, email address and profile picture.
What you save: the places you star and the pins you save (with the names you give them), the hotels you save (with your dates, the price a night and your notes), the walks you keep (where they start and end), and your trips (their days and stops, times, notes, costs and budget).
Your preferences, so they follow you to your other devices (but not the graphics, which stay with each device).
When each thing was saved or last changed.

All of it is kept in Google's Cloud Firestore database, under your account. Only you can see or change it: the database's rules let each account read and write only its own things. Your browser also keeps a copy, so what you've saved shows at once and works offline. Your name or email address is kept on your device too, to show who's signed in while the account loads.

We use it only to show it back to you: to put your saved places on the map, plan your walks and lay out your trips.

What City Guide 3D doesn't do

No ads, and no analytics or tracking: nothing records what you look at or where you click.
No selling or sharing of your information with anyone.
No location tracking: the guide never asks where you are. "Your pin" and "your stay" are only what you choose to put on the map.

The services City Guide 3D runs on

Google Firebase hosts the site, runs the accounts and stores what accounts save. Like any web host, it handles the technical details your browser sends (such as your IP address) to deliver the pages. See Firebase's privacy information.
Google sign-in, if you choose it: Google's own privacy policy covers your Google account. Your profile picture is shown from Google's servers.
OpenStreetMap: the maps and the places come from OpenStreetMap (map data © OpenStreetMap contributors, available under the Open Database License). They're part of the site itself: your browser doesn't contact OpenStreetMap to show them.

Deleting your data

You can delete your account, and everything in it, at any time: click your name at the top right (on the home page or in any city), then Delete my account. Your saved places, pins, hotels, walks, trips and preferences are deleted, and then the account itself. It can't be undone.

You can also remove single things whenever you like: unstar a place, delete a saved hotel, walk or trip.

Children

City Guide 3D isn't meant for children under 13. If you're under 13, please don't create an account.

Changes

If what City Guide 3D keeps changes, this page will change with it, and the date at the top will say when.