pariGINI

Simple as that

Three taps to fairness.

1

Pick a category

2

Add everyone's starting address

3

pariGINI does the rest

What are you looking for?

Seven categories, and many more on the way.

Ⓜ️ Metro

🍿 Cinema

🌳 Parks

🍻 Bars

🏛️ Museums

📚 Libraries

🪩 Clubs

📌 Saved places

The name is a hint

Stolen straight from economics.

The Gini coefficient was invented by Italian statistician Corrado Gini in 1912 to measure income inequality within a society. A score of 0 means perfect equality — everyone earns the same. A score of 1 means one person holds all the wealth. For decades, it has been the standard tool used by economists to track the fairness of income distributions across countries.

pariGINI borrows the same index and applies it to travel times instead of incomes. Low Gini → everyone travels roughly the same distance. High Gini → somebody is stuck with a much longer commute while everyone else barely moves.

Fair index = mean travel time × (1 + Gini index)

This formula keeps total travel time short while penalising options where one friend bears a disproportionate share of the commute. It's the mathematical expression of a simple idea: fair means everyone matters equally.

Fairness score at a glance

Most fair Least fair

92% — everyone wins 55% — decent tradeoff 21% — someone suffers

Origin

Born from injustice and laziness.

This app and the idea behind it was born from a mix of a strong sense of injustice and a healthy dose of laziness.

Most of our friends live in the 11th arrondissement. Except for a few. And those few threatened to build a tool to shift the gravitational centre of our aperitivos somewhere more accessible.

So here it is.

pariGINI finds the fairest place to meet — not just the fastest, but the most equitable. It's a small invitation to move through the city not as isolated individuals, but with awareness of the others who share this space.

"Enjoy <3"