How big is your bubble?

Tap the places you go every week and see how much of your city is really yours.

How it works

  1. Mark your week

    Tap the map or search for where you live, work, go out, see friends, and spend your free time.

  2. See your bubble

    We draw your bubble on a map of your city and show how much of it you cover.

  3. Compare with a friend

    They guess yours first, then find theirs, and you see where your bubbles meet.

Questions people ask

How do you draw my bubble?

Each place you pick gets a circle that reaches about ten minutes' walk in every direction, and places close together blend into one shape. It's a picture of the places in your week, not a record of where you've been.

What counts as the city?

The part of the city most people there mean by its name, such as Paris's 20 arrondissements, New York's five boroughs, or inner London. Your result names it. We count its built-up part, where at least 1,500 people live per square kilometer, and the parks and rivers inside it. When most of your bubble is outside it, we measure it against the whole built-up area around it, such as Greater Paris. Los Angeles is measured as its whole built-up area, up to the county line.

Where do the numbers come from?

People come from the EU's Global Human Settlement Layer 2025 population grid (GHS-POP R2023A, European Commission, Joint Research Centre, CC BY 4.0). Places, stations, parks, city limits, and districts come from OpenStreetMap contributors (ODbL), and some names and postcodes from GeoNames (CC BY 4.0). A few boundaries come from the City of Chicago, the Australian Bureau of Statistics (CC BY 4.0), and São Paulo's GeoSampa. The numbers are estimates, so we round them.

Is a small bubble bad?

No. Its size only comes from the places you picked and how far apart they are. A small one often means a neighborhood that knows you.

How many places do people really go to?

A 2018 study in Nature Human Behaviour by Laura Alessandretti and colleagues followed about 40,000 people. Most kept going back to about 25 places, and over time new places took the spots of old ones.

Is my home on the map?

Only as a named place, such as a neighborhood or a station, never an address. A tap on the map picks a named place nearby, and it's all worked out in your browser. If you share your bubble, anyone with the link can see the places you picked and the name you add. We count visits, finished bubbles, shares, and how close guesses come, never the places you picked or your name.

Which cities are on the map?

The cities listed at the start. We're adding more.

What is Timeleft?

Timeleft brings small groups of strangers together every week, for dinner, drinks, coffee, or a walk. 4M+ members in 200+ cities.