Buzzer Knockout
Stavros Petropoulos Games iPhoneiPadiPod touchApple Watch
Buzzer Knockout is a free Games app for iPhone and iPad by Stavros Petropoulos. Requires iOS 17.6. Updated October 12, 2026.
- Price
- Free
- on the App Store
- Size
- 25 MB
- Age 4+
- Updated
- Oct 12
- 2026 · v1.7
Screenshots
About Buzzer Knockout
Stop the timer at exactly 10.00 seconds – without looking. Buzzer Knockout turns the stopwatch challenge into a party game. Everyone sees the same target time, say 6.7 seconds. Hit the buzzer to start an invisible timer and hit it again when you think the time is up. Closest to the target wins. No display, just your sense of timing. NEW: BUZZER ROYALE Every Friday at 8 pm (Berlin time) everyone plays at once. Each round the worse half is out, until only one is left. Will you be the last one standing? GAME MODES • Solo: Train your timing and chase your personal best. • NEW – Career: 50 levels in 5 chapters, up to 3 stars each. After the warm-up come Quick Glance, distractions, ghosts, wind and snow – every new star earns Sparks. • NEW – TV party: one iPhone or iPad shows the target and the ranking on the TV via AirPlay, every other phone becomes a buzzer. • Classic: 2 to 8 players on one device – take turns, pass the phone, done. • NEW – Party mode: Every turn brings a house rule – weaker hand, eyes closed, on one leg … • Knockout: Whoever is furthest off each round is out. • Time Guess: A counter starts visibly and vanishes after one second. How long did it run? • 10-Second Challenge: a fixed 10.00 s target and a result card to share. • Table Mode: Several players buzz at the same time on one screen, up to four on iPad. • Tournament: 4 or 8 players in a knockout bracket all the way to the final. • Online: Quick Match, private rooms via code or link, Time Guess and rematches – no Game Center account needed. DUEL BY LINK Three rounds, fixed target times: play first, send the link – your friends play the same times whenever they like. Even without the app: they play straight from the link via App Clip or in the browser. • Rematch in one tap – your opponent gets a notification with three new target times • Get notified as soon as someone plays your duel • A result card to share and stickers for iMessage MADE FOR GAME NIGHT • Local games are free – one device is all you need. • Teams: Compete in groups. • Handicaps like “Quick Glance” and “Distraction” level the field between pros and beginners. • Dare cards: Whoever finishes last in a round draws a card. AN EVENT EVERY MONTH Ghost Hour in October, Autumn Wind in November, Snow Storm in December: the buzzer vanishes, gets pushed around by the wind or snowed in – with double pass XP. And on December 31 the New Year's countdown: tap exactly at midnight – without a clock. DAILY CHALLENGE The same target time for everyone, worldwide, every day. Three attempts, one global leaderboard – how close can you get today? • NEW – Country league: your country counts too, with a flag next to your name. • Weekly league: your five best days count, and the top players earn Sparks every Monday. • Friends ranking: whoever opens your link joins your leaderboard. • Streaks with bonus Sparks – rescue a missed day with Sparks or a video. • Home and Lock Screen widget: today's target and your streak at a glance. • NEW – Apple Watch: stop blind on your wrist, with training and the Daily Challenge. COLLECT AND LEVEL UP • Buzzer Pass with monthly themed seasons • Daily Quests and dozens of Achievements • Buzzer skins, themes, frames, name effects, confetti and victory animations • Daily deals in the Shop • Back up your progress with iCloud BUZZER KNOCKOUT PLUS Unlock once: no ads, all dare card packs and an exclusive theme. IN 13 LANGUAGES English, German, Spanish, French, Portuguese, Italian, Dutch, Polish, Bosnian, Croatian, Serbian, Greek and Turkish. Buzzer Knockout is free to play. It contains ads and optional in-app purchases. How good is your timing?
What’s new
Version 1.7 · Updated October 12, 2026
Version 1.7 – our biggest update: Buzzer Royale, TV party, career and Apple Watch. • Buzzer Royale: every Friday at 8 pm (Berlin) everyone plays at once. Each round the worse half is out, until only one is left. • TV party: one iPhone or iPad shows the target and the ranking on the TV via AirPlay, every other phone becomes a buzzer. • Career: 50 levels in 5 chapters, up to 3 stars each – with Quick Glance, distractions, ghosts, wind and snow. • Apple Watch: stop blind on your wrist, with training and the Daily Challenge. • Rematches and notifications: hear right away when someone plays your duel, and ask for a rematch with one tap. • Country league: in the Daily Challenge your country counts too – with a flag next to your name. • An event every month: Ghost Hour, Autumn Wind, Snow Storm – and on December 31 the New Year's countdown. • Duels without the app: friends play your link straight away, via App Clip or in the browser. • Stickers for iMessage, a result card for duels, and rescue your streak with a video. • Every sound pack remade, new victory animations and special effects for the lightning, fireworks, rainbow and Halloween confetti. • Now in Spanish, French and Portuguese. Plus small improvements and bug fixes.
Play today's Threadline puzzle
Draw one line through every cell, visiting the numbers in order. A free daily puzzle from Fiplay, same board for everyone. It plays right here, no download.
App privacy
The developer, Stavros Petropoulos, reported these privacy practices to Apple.
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers: Device ID
- Usage Data: Advertising Data
Data Linked to You
The following data, which may be collected and linked to your identity, may be used for the following purposes:
- Identifiers: Device ID, User ID
- Usage Data: Product Interaction
- User Content: Gameplay Content
Used for: Third-Party Advertising, Analytics, App Functionality
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Usage Data: Advertising Data
- Diagnostics: Crash Data
Used for: Third-Party Advertising, Analytics
Alternatives to Buzzer Knockout
Looking for apps like Buzzer Knockout? Here are 6 similar apps on the App Store. The highest rated is Tiiime : The Game (5.0/5), and all 6 are free to download.
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BlindSec: 10 Second Challenge
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RankleAI
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| Buzzer Knockout | – | Free | October 12, 2026 | |
| Tiiime : The Game | 5.0 / 5 (1) | Free | Feb 19, 2026 | Compare |
| Stop the Timer: Stopwatch Game | 5.0 / 5 (3) | Free | Jul 9, 2026 | Compare |
| Blind Buzzer: Timer Game | 4.8 / 5 (93) | Free | Aug 25, 2026 | Compare |
| Guess The Time : Perfect 5 | 4.1 / 5 (14) | Free | Jul 1, 2026 | Compare |
| BlindSec: 10 Second Challenge | – | Free | Oct 7, 2026 | Compare |
| RankleAI | 4.0 / 5 (2) | Free | Mar 19, 2026 | Compare |
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