Catan dice tracker
Tap the two faces you rolled — or just tap the total — and the board keeps every roll, then draws what actually came up against where probability says it should be. Two dice by default; add or drop dice for Cities & Knights or anything else you play. Players are optional: add them and the table splits into a column each, the turn passes itself around, and the chart will narrow to one person at a time. Everything stays on your device: this page can't make network requests.
The roll
Players
House rules
Rounds, players, and what is optional
Out of the box the tracker just logs rolls — tap, tap, tap, and each one lands in the table as its own line. Add players, down under the chart, and it takes a scoreboard shape instead: a round becomes one lap of the table, so the table is rounds down the side and a column per player across the top, and the turn passes itself along without you touching it. That is what lets you see at a glance that Bob has rolled three 7s and you have rolled none. Rolls you logged before adding anyone keep their own column, marked —, because they genuinely were not any one player's. Tap any cell to move the cursor there and fix it; the next number you tap overwrites that slot, then the cursor jumps back to wherever the game actually is.
Two ways to enter a roll
Tap a face in each column and the roll records itself the moment every die has one — two taps, and the tracker remembers the individual faces, which is the only way to catch a single bad die later. Or skip that and tap the total, which is one tap and all Catan really needs. The dashed box at the end of that row takes a typed number and Enter, for the setups where the buttons run out. All three land in the same place.
Are the dice actually cold?
The chart draws what you rolled against what two fair dice owe you. With 2d6 there are 36 equally likely face pairs, so the expected share of any total is the number of pairs that make it over 36 — six ways to make 7, one to make 12. The dashed cap on each bar is that share times the number of rolls so far, and the dropdown above the chart narrows all of it to a single player, which is how you settle whether the dice are cold or only cold for you. Read it with a long memory: after 30 rolls a number being 3 short of expectation is ordinary noise, not a conspiracy. It takes hundreds of rolls before a gap means anything, which is usually the honest answer to the argument you are having.
Does any of this leave my device?
No. The page makes exactly one outside request: an anonymous page-view ping that records the address /catan/ and nothing else. Names and rolls are never part of it, and the tool's own code cannot make a network request at all. They are saved only in your browser's local storage, so the game is still here if you close the tab mid-game. “Clear game” wipes it.