Call heads or tails, then watch the coin go up, spin and come down. Land on your call and you hold your bet times 1.94: cash out, or flip again to double it (3.88, 7.76, 15.52 and on), up to 20 flips in a row. A wrong call loses the streak.

Make your call on the coin itself: tap it to turn it over, or tap Heads or Tails under it (H and T on a keyboard), and change it before any flip. Every point you cash out at returns the same 97% on average: going further only changes how often you lose. Auto flips with your call, or alternating, and cashes out after the number of flips you set, with a stop at a profit or a loss.

Every flip comes from your own provably fair seed pair, in order, when you ask for it, never before. Check any streak on the Provably fair page.