Refunc · gumshoe 19-08 21:16

A tally counter for trodden-in chewing gum, the second most counted piece of street litter after cigarette ends. Tap the pavement where the gum is; each tap is one blob, and the sheet becomes a picture of your walk. Let the page measure your walk and the count turns into a density per square metre of pavement, and from there into the two numbers that matter: how many blobs your whole city stands on, and what scraping them off would cost at the price you set. Dutch councils quote one to three euros a blob for steam-cleaning; the default here takes the middle.

What it does not do: no map, no photographs, and nothing leaves your phone. The position feeds a distance counter and is thrown away; the tally lives in your own browser and the reset button asks twice. Counting without measuring is fine too — then it is a tally, not a density, and the page says so.