AI-powered analysis

How well does your city match your biology?

Enter any city in the world. The system retrieves local lifestyle data — dining culture, work norms, nightlife patterns, sunlight hours — and scores it against your chronotype's biological preferences.

Configure your sync check

Your chronotype

City name

Why does your city's rhythm matter?

Chronobiologists have documented significant variation in how different cities and cultures organize time. The concept of "social zeitgebers" — social time-givers — describes how meal times, business hours, nightlife patterns, and commuting norms act as external cues that entrain your biological clock. If your internal clock is misaligned with your city's social clock, the result is a form of chronic social jetlag.

Research by Till Roenneberg's group found that social jetlag — the discrepancy between biological sleep timing and socially required sleep timing — affects roughly two-thirds of the working population to some degree. When the mismatch is large, the consequences resemble shift work: poorer metabolic health, increased cardiovascular risk markers, and reduced cognitive performance during socially required waking hours.

Cities differ considerably in their chronobiological profile. Barcelona's famous late dining culture (dinner at 9–10 PM, bars open until 3 AM) inherently favors Wolf-type chronotypes. Tokyo's precision commuter culture and early business norms align better with Lion and early Bear types. Melbourne's blend of Mediterranean café culture and outdoor lifestyle tends to suit Bears well.

The City Sync Score is not about where you should live — it is about understanding how much your current city is working with or against your biology, and what adjustments might help close the gap.

How the sync score is calculated

The algorithm compares your chronotype's ideal parameters — work start time, dinner time, sunlight preference, noise sensitivity, and nightlife compatibility — against the city's cultural profile. Five factors contribute to the final score:

Work schedule alignment — how closely the city's typical work start time matches your chronotype's optimal work window
Dining culture — whether meal times align with your digestive rhythm
Nightlife compatibility — whether the city's evening energy works for or against your chronotype
Sunlight availability — annual sunlight hours affect serotonin and melatonin regulation
Noise and commute stress — factors that measurably impair sleep quality

The resulting score is a rough heuristic, not a precise measurement. It is meant to prompt reflection, not dictate choices.

The AI model provides reasonable approximations based on cultural and geographical knowledge. For major world cities the data is generally representative. For smaller or less-documented cities, regional or national averages are used as a proxy. Treat the score as an indicative estimate.

Yes, enter any place name. For very small towns the model will use regional norms. Results are less precise the more localised the location, but still give a useful directional answer.

Not necessarily. The score is a tool for self-awareness, not a relocation recommendation. A low sync score with your current city is useful information — it explains friction you may already feel, and points toward practical adjustments like schedule timing, light exposure habits, or meal timing that can partially compensate.