Flip a Coin
Running tally
Settling it fairly
A coin flip only works as a decision if both people believe it was fair. This one takes a cryptographic random bit for every flip and shows the running tally, so the fairness is something you can watch rather than something you have to take on trust.
Streaks are normal
In a hundred flips, a run of six or seven the same way is more likely than not. Randomness clumps; it is the absence of streaks that would suggest something was wrong.
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Frequently Asked Questions
Yes. Each flip takes a cryptographic random bit, so both outcomes are exactly as likely. The tally lets you check it yourself — flip a few hundred times and the split settles close to even.
No. Eight in a row happens roughly once in every 256 runs of eight, so it is unremarkable. A truly random sequence looks streaky; it is patternless sequences that would be suspicious.
Never. Each flip is independent. The belief that tails is "due" after a run of heads is the gambler's fallacy, and it is the single most expensive mistake in games of chance.
Yes, up to fifty. Useful when you want a majority decision rather than a single call.
Slightly less than you would think. Careful studies find a real flip lands on the side that started facing up about 51% of the time, because of how the coin wobbles. A random bit has no such bias.