Draws numbers at random, never repeats one, and keeps every call visible so latecomers can catch up. Free, nothing to install, and readable from the back of a room.
Two formats dominate and they are not interchangeable. 75-ball bingo, standard in North America, uses a 5×5 card with a free centre square and the letters B-I-N-G-O mapped to number bands: B is 1–15, I is 16–30, N is 31–45, G is 46–60, O is 61–75. Because of that banding, the traditional call is a letter and a number together — "B-7" — which lets players scan a single column instead of the whole card.
90-ball bingo, standard in the UK, Ireland and Australia, uses a 9×3 ticket with fifteen numbers on it and is normally played in three stages: one line, two lines, then a full house. There are no letters. Sets are usually sold in strips of six tickets that between them contain all ninety numbers exactly once, which is why a strip guarantees you mark something on every single call.
Decide the format before you start, because it changes how long the game runs. A 75-ball single-line game often ends inside twenty calls; a 90-ball full house usually needs somewhere in the fifties.
This is the question people get wrong when planning an event. For 75-ball bingo with a normal room of players, a single horizontal line typically falls somewhere between the fifteenth and twenty-fifth call, and a blackout (every square) needs almost the whole ball set — expect the high sixties or beyond. For 90-ball, a first line usually lands in the twenties and a full house in the low-to-mid fifties.
Two practical consequences. First, more players make games shorter, not longer: with more cards in play, someone hits the pattern sooner. Second, if you have a fixed slot to fill, control the length with the pattern rather than the pace — switching from full house to one line will halve a game far more reliably than calling faster.
A bingo caller is not the same thing as a random number generator, and the difference is the whole point. A generator picks from 1–75 every time, so it will eventually repeat a number, which invalidates the game. A caller draws without replacement: each number leaves the pool once it is called.
That has a consequence worth knowing. Early in a game each remaining number has a 1/75 chance; by the sixtieth call the fifteen survivors are each at 1/15. The odds move as the game goes, which is exactly why late-game bingo feels tense — that tension is real, not imagined.
Yes. It is free with no sign-up and nothing to install. Open the page and start calling.
No. Numbers are drawn without replacement, so a called number leaves the pool and cannot come out again in the same game. That is what separates a bingo caller from a plain random number generator.
Yes. Every called number stays visible on screen, so players who lost track can catch up and you can verify a winning card against the record instead of relying on memory.
Yes. Choose Offline and it becomes a pure number caller that replaces the cage and the balls, not the cards. Pick the 1-75 range for American cards or 1-90 for UK-style tickets.
Yes. It scales from a phone up to a projector, so you can put it on the biggest screen in the room or share it on a video call. For remote players, host a room instead: friends join by link, get their own card on their phone, and see the same draw at the same moment.
For 75-ball bingo a single line usually falls between the fifteenth and twenty-fifth call, while a blackout needs most of the ball set. For 90-ball, a first line tends to land in the twenties and a full house in the low fifties.