Hit the time.
Blind.
A target time appears. Then an invisible timer runs. Stop it at the right moment — whoever's closest wins. No display, just your gut.
Three seconds of rules, an evening of drama.
No tutorial needed. You get it on the first buzz.
Memorize the target
Everyone sees the same time — say, 6.7 seconds.
Stop it blind
The timer runs invisibly. You buzz when you think the time is up.
Smallest deviation wins
Measured to the millisecond. Closest to the target takes the round.
Solo, around the table, or against the world.
Local games cost no Sparks — just play, as often as you like.
Solo
Train your timing and chase your best deviation.
Classic
2–8 players, one device, buzz in turns. Pass the phone, go. Play in two teams if you like.
Knockout
Worst of each round is out. Keep your nerve to the end.
Time Guess
A counter starts visibly and disappears after one second. Everyone guesses how long it runs in total — best guess wins.
10-Second Challenge
Always the same target: 10.00 seconds. Hit it as precisely as you can and share your result card.
Table Mode
Everyone buzzes at the same time on one screen: two players on iPhone, up to four on iPad.
Tournament
4 or 8 players, a knockout bracket of duels. Round after round until only one is left.
Duel by Link
Three rounds with fixed target times. Play first, send the link — friends play the same times whenever they like.
Party Mode
Every turn comes with a house rule: weaker hand, eyes closed, on one leg. Plus task cards after every round.
Ghost Hour
The October event: the buzzer keeps vanishing for a moment while a ghost drifts past — and you earn double pass XP.
Even more chaos for game night.
Teams
In Classic mode, two teams face off against each other.
Handicaps
“Quick Glance”: the target is shown for just one second. “Distraction”: disruptions while the timer runs.
Task Cards
Whoever finishes last in a round draws a task. The basic pack is free, four more packs are in the shop — new: “Game night”.
Collect, level up, show off.
Daily Challenge
The same target time for everyone worldwide, every day. Three attempts, one global leaderboard. Challenge friends with a link and keep your streak for bonus Sparks — once a week you can rescue a missed day.
Weekly League & Friends
Your five best days of the week count, and the best players earn Sparks. Whoever opens your link joins your friends ranking.
Widget
Today's target time and your streak on your home and lock screen — one tap and you're in the Daily Challenge.
Your Sense of Time
Clockwork, impatient or snail? The app reads your type from your stops — as a card to share.
Sparks
Earn Sparks every round and spend them in the shop or on online Quick Matches.
Buzzer Pass
A new themed season every month with rewards across 30 tiers — free and premium.
Daily Quests
Fresh objectives every day for bonus Sparks.
Achievements
Dozens to unlock — from first game to the perfect round.
Cosmetics
Themes, Name FX, frames, confetti and win animations. Everyone sees your Name FX — on the world leaderboard too.
iCloud Backup
Sparks, purchases and progress are backed up via iCloud — still there after you switch devices.
Buzzer Knockout Plus
Buy once: ad-free, all task card packs and an exclusive theme.
Worldwide
Player names in over a dozen languages — at home anywhere.
Quick match or private room.
Get matched with other players worldwide via Quick Match — or create a private room and invite friends by code or link. Game Center is optional; a nickname is all you need. If nobody is in the queue right now, clearly labeled practice opponents step in so you don't have to wait.
Matches run in sync on our own game server in Germany: the server sets the target time and scores the round. Time Guess is available online too — and after the match, there's the rematch.
How good is your timing?
Buzzer Knockout is available now on the App Store — for iPhone and iPad. Download, memorize the target, buzz.
Download on theApp Store