Tombolio

Yes or no wheel

Press “Spin the wheel”.

Session history

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    Stuck between two options and nobody wants to decide? Ask your question out loud, spin the yes or no wheel and go with the answer. With two equal slices, each answer has exactly a one-in-two chance.

    How to use it

    1. Phrase your question so it can be answered with a yes or a no.
    2. Keep the two slices “Yes” and “No”, or add a line such as “Maybe” or “Ask again” if you want a third outcome.
    3. Press “Spin the wheel” and read the answer shown below the wheel.
    4. Check the session history to see the run of answers, then clear it to start fresh.

    Ways to use it

    • Break a deadlock

      Order now or wait, go out tonight or stay in: when both options are equally good, the wheel decides and saves you from going round in circles.

    • Run a classroom debate

      Have each group spin for the side it will argue, for or against, then give them time to prepare their case.

    • Add suspense to a game

      Truth or dare, forfeit or not: the wheel on full screen makes the decision visible to every player.

    • Decide as a group without a vote

      When the team is evenly split on a minor question, one spin during the meeting stops the discussion dragging on.

    How the randomness is guaranteed

    The answer is drawn by your browser’s cryptographic generator (crypto.getRandomValues). With only “Yes” and “No” on the wheel, each answer has a probability of exactly 50%.

    The draw method throws away values that would favor one slice over another (modulo bias). If you add a third line, all three outcomes have a one-in-three chance each.

    The answer is fixed before the wheel starts turning; the animation only reveals it. Nothing is sent to a server: the draw happens on your device.

    Frequently asked questions

    Is the yes or no wheel really 50/50?

    Yes, as long as the wheel only holds “Yes” and “No”. Each slice has the same probability, and the draw uses a cryptographic generator with no modulo bias.

    Can I give “Yes” a better chance?

    Yes, by adding several “Yes” lines. For example, three “Yes” and one “No” give yes three chances in four. Each line counts as one slice of the wheel.

    Can I add a “Maybe” answer?

    Yes. Add a line such as “Maybe”, “Ask again” or “Tomorrow”: the wheel accepts up to 200 entries, and every answer will have the same probability.

    Do I have to do what the wheel says?

    That’s up to you. The wheel is mostly a way out of indecision on choices that don’t matter much. For an important decision, take the time to weigh the pros and cons.

    Why does the same answer come up several times in a row?

    Each spin is independent of the last. Three “No” answers in a row happen on average once in eight tries: that’s normal randomness, not a fault.

    Can I keep my custom answers?

    Your list is saved in your browser and comes back on your next visit. The “Copy share link” button also lets you send it to someone else.

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