Your personal flip dashboard
Every coin you flip anywhere on this site — single tosses, ten-flip batches, thousand-flip experiments — is recorded to the same local session statistics. This page is the dashboard for all of it: total flips, heads and tails counts, the running percentage split, and your longest heads and tails streaks to date.
The data lives in your browser's local storage, never on a server. Nothing is tracked across devices or shared with anyone, and the reset button at the bottom wipes the entire history in one click if you want to start counting again from zero.
Streaks: the shape of randomness
Two numbers here tend to surprise people. First, the longest streak: after a few hundred flips you will almost certainly have seen five or six identical results in a row somewhere — that is expected, not suspicious. Second, the current streak: whatever the last run of flips produced, which resets in type every time the other face appears.
Streaks are the most commonly misread feature of randomness. A long run of heads does not make tails 'due' — each flip is independent — but streaks of length five and six are so ordinary in large samples that their absence would actually be stranger than their presence.
From anecdote to dataset
Single flips are anecdotes; a thousand flips are a dataset. If you have been running batches on the 10-times, 100-times or 1000-times pages, the batch history table here shows your recent runs with their heads/tails splits, so you can watch the combined percentage tighten toward 50% as your lifetime total grows.
That convergence is the law of large numbers working on your own data, not a textbook diagram — the most persuasive probability lesson available anywhere, and it costs you nothing but a few idle clicks.