Tenstop vs Buzzer Knockout
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Tenstop
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10 Second Challenge is a simple yet deep timing game. Press start and try to stop exactly at 10 seconds! The thrill of precision will keep you hooked. After each attempt, you'll see how many seconds off you were and your accuracy percentage, with your best record saved. For an added challenge, try the hidden timer mode. This game will test your sense of time and concentration—give it a try!
Buzzer Knockout
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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 IN 1.8 • Quick duel: a real opponent right away – play against the recorded run of a player near your level. • Clubs: up to 30 players compete as a team in the weekly league. • Invite friends: every friend who joins through your link brings you both Sparks. • Career: 70 levels in 7 chapters – now with double stops, a metronome, a vanishing clock and a wandering buzzer. • An Advent calendar in December and your year in review to share. 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 – with a countdown on your lock screen. GAME MODES • Solo and Career: train your timing and collect up to 3 stars per level. • TV party: one iPhone or iPad shows the target and the ranking on the TV via AirPlay, every other phone becomes a buzzer – everyone for themselves, in teams or as hot potato. • Classic: 2 to 8 players on one device – take turns, pass the phone, done. • Party mode: every turn brings a house rule or a random twist. • Knockout: whoever is furthest off each round is out. • Time Guess: a counter vanishes after one second. How long did it run? • 10-Second Challenge, Table Mode and Tournament. • Online: Quick Match and private rooms via code or link – 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 via App Clip or in the browser. Rematch in one tap, a notification as soon as someone has played, a result card and iMessage stickers. MADE FOR GAME NIGHT • Local games are free – one device is all you need. • Teams, handicaps like “Quick Glance” and “Distraction”, and dare cards for whoever finishes last. AN EVENT EVERY MONTH Ghost Hour in October, Autumn Wind in November, Snow Storm in December – 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 – and a curve of how everyone else did today. • Weekly league, club ranking, country league and friends ranking • Streaks with bonus Sparks – rescue a missed day with Sparks or a video • Widget, Control Center controls and Siri shortcuts • Apple Watch: stop blind on your wrist COLLECT AND LEVEL UP • Buzzer Pass with monthly themed seasons • Daily Quests and dozens of Achievements • Buzzer skins, themes, frames, name effects, confetti, victory animations and four app icons • Back up your progress with iCloud BUZZER KNOCKOUT PLUS Unlock once: no ads, all dare card packs and an exclusive theme. IN 15 LANGUAGES English, German, Spanish, French, Portuguese, Italian, Dutch, Polish, Bosnian, Croatian, Serbian, Greek, Turkish, Japanese and Korean. Buzzer Knockout is free to play. It contains ads and optional in-app purchases. How good is your timing?
Screenshots
Verdict
The clearest difference is update cadence: Buzzer Knockout at every 8 days against Tenstop's every 6 months. Tenstop's advantage is iOS requirement (15.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Tenstop sells 2 in-app purchases, starting at $4.99 per month and Buzzer Knockout sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Tenstop ships an update every 6 months, Buzzer Knockout every 8 days. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.
| Parameter | Tenstop | Buzzer Knockout |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 months | Every 8 days — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 15.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 74 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | kota tada | Stavros Petropoulos |
In-app purchases
Tenstop
- Ad-free for 1 month7 Days trial$4.991 Month
- Ad-free for 1 year14 Days trial$49.991 Year
Buzzer Knockout
- 100 Sparks$0.99
- Starter Pack$1.99
- 500 Sparks$2.99
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- Season Pass$3.99
- 1,200 Sparks$3.99
- Buzzer Knockout Plus$4.99
- Premium Pass$8.99
- 3,000 Sparks$8.99









