How scoring works

Every entry scores intensity × smell × duration × context. Your rank is the sum of those scores over the period. Nothing is hidden, nothing is weighted secretly, and the whole formula fits in one line.
Key facts
Formula
intensity × smell × duration × context
Intensity
1 to 5, self-rated
Smell
1 to 5, self-rated
Duration
In seconds, minimum 1
Context
1.0× to 3.0× depending on location
Leaderboard
Sum of entries · weekly, monthly, all-time

The formula

Each logged entry produces a combo score:

combo = round( intensity × smell × duration_seconds × context_multiplier )

Intensity and smell are rated 1 to 5 when you log. Duration is measured in seconds, with a floor of 1. The context multiplier comes from the table below. The result is rounded to the nearest whole number, and that is your score for that entry.

Your position on the leaderboard is simply the sum of your combo scores across the selected period. No hidden decay, no secret weighting, no ranking algorithm in the machine-learning sense — just addition.

The context multiplier table

This is where the game lives. The multiplier rewards social risk, not volume: a modest emission in a lift is worth three times the same emission at home.

ContextMultiplier
Elevator3.0×
Date2.8×
Meeting2.6×
Public transport2.4×
Plane2.2×
Restaurant2.0×
Gym1.6×
Street1.4×
Work1.3×
Car1.3×
Bathroom1.0×
Home1.0×

Anything logged without a context — including every quick-add — is treated as 1.0×.

A worked example

Intensity 4, smell 5, three seconds, in a meeting:

4 × 5 × 3 × 2.6 = 156

The identical entry logged at home scores 60. That difference — 96 points for choosing the worse moment — is the entire design of the game in one number.

Quick-add versus full log

The big button on the home screen is a quick-add: one tap, no rating screen. It records the minimum of everything — intensity 1, smell 1, one second, no context — so it scores a single point.

Quick-adds also count as half a day toward your streak rather than a full one. They exist so that a real event never goes unrecorded when you have four seconds and no privacy, not as a scoring route.

Daily limits

The cap is deliberate. Without one, the leaderboard measures free time rather than anything about the user, and the top of the table becomes whoever was most bored. Three well-chosen entries beat thirty lazy ones under this formula anyway — a single elevator log outscores a whole day at home.

Leaderboard periods

Three views: weekly, monthly and all-time. Every one is aggregated live from the underlying entries when you open the page, so there is no snapshot delay and no overnight batch job to wait for. A log made thirty seconds ago is already in the ranking.

The weekly board is the one that matters for newcomers: it resets, so joining in month eight does not put the top spot permanently out of reach.

Keeping it honest

Three self-rated inputs in a competitive game is an obvious invitation, and the design accounts for it:

None of this makes the leaderboard tamper-proof, and it would be dishonest to claim otherwise. It makes cheating tedious and unrewarding, which for a game about farts is the correct amount of security.

Frequently asked questions

Why is smell self-rated instead of measured?
Because measuring it needs hardware nobody owns. Intensity and smell are honest self-reports; duration is the one input the phone can measure, and it is measured.
Does Pro give a scoring advantage?
A higher daily ceiling, yes — 50 full logs against 3. It does not change the formula, the multipliers or the ranking maths. The weekly board is where free accounts stay competitive.
Can I see the score of an individual entry?
Yes, it is shown the moment you finish logging, and every entry keeps its combo score in your history and on the Wall of Fame.
Will the formula change?
Possibly — it is a game, and games get balanced. Any change to the multipliers or the formula gets documented on this page with the date, rather than shipped quietly.

New here? What FartRank is covers the rest, and the guides cover the biology behind the numbers.

NOW GO SETTLE IT ON THE LEADERBOARD

Free forever. Two taps to log. One global ranking.

Start ranking →

Published 26 August 2026 · by Furiosa Studio