did you know?
For timing, your eyes lose to your ears by about 10×.
Your eyes blur two events that fall close together. Your ears keep them apart down to a few thousandths of a second. Acrobeat is a game built entirely in that sliver.
Rough figures, and the exact numbers depend on the task, but the order of magnitude is real: auditory timing resolution is roughly ten times finer than visual. That is why Acrobeat asks you to listen, not look.
Acrobeat is a free browser game about timing. You hear two short beeps, and the silence between them is your target. Reproduce that gap and a climber leaps up a staircase of light; the closer your timing, the higher the leap. Every level the margin tightens, toward the limit of human timing perception. Nothing to download to start playing, no account to make, and an Android app on Google Play if you want it.
The gap is the game
You do not match a picture, you match a duration. The gap changes every round (the game varies it from about 350 to 750 ms). Hold the silence you heard, then reproduce it. Trust your ears, not your eyes.
How to play
Listen
Press play and hear two beeps. The silence between them is your target.
Match
Reproduce that gap. The on-screen bar is only a rough guide.
Climb
A good match steps you up a level. A miss drops you to the ground.
Two control schemes are switchable from the settings gear: tap (tap to start, tap again to land) and hold (press and hold, release to land). On Android you can also turn on an optional vibration mode to feel the beat.
Every level tightens
At level 1 the window is a forgiving 75 ms. It tightens by 5 ms each level and bottoms out around 15 ms, close to the edge of what a person can perceive. That is the whole climb.
Two ways to play
Free climb
Where most of the game lives. Climb as high as you can and chase your best level, your peak. Fall, learn, climb again.
Daily challenge
Ten steps, the same for everyone that day, one attempt. Your result is a shareable grid, and finishing on consecutive days builds a streak.
Why it is played by ear
Most timing games are really tests of vision: watch a marker, hit a target on screen. Acrobeat flips that. Human hearing resolves time far more finely than sight does. Your eyes blur two flashes that fall within roughly a fiftieth of a second into a single event, while your ears can keep two clicks apart down to a few thousandths of a second. That gap, about a factor of ten, is why a rhythm felt by ear can be so much more precise than one judged by eye, and it is the whole reason Acrobeat hands the job to your ears instead of your eyes.
It also makes the game unusual in a good way. It is one of the few timing games a blind player can play from start to finish with nothing adapted, because the information you need was never on the screen to begin with.
Tips to climb higher
- Listen before you move. Let both beeps land and hold the gap in your head before you reproduce it. Rushing the first tap is the most common early mistake.
- Feel the gap, do not count it. The lower levels are slow enough to almost count, but the higher gaps are too short for that. Treat it like echoing a rhythm back, not like reading off a number.
- Trust your ears over the bar. The on-screen bar is a rough guide that means less as the margin tightens. Players who stare at it tend to plateau; players who listen keep climbing.
- Stay loose after a miss. A fall sends you back to the ground, so a long run is really about consistency. Reset your focus instead of chasing the gap you just lost.
- Mind your audio. Wired headphones or your device's own speaker give the cleanest timing. Wireless adds a small delay that can throw off the shortest gaps. If you keep landing late, open settings and run calibrate by ear and the game corrects for it.
Play with sound on
Acrobeat is an audio game. The whole point is reproducing a gap you hear, so play with your sound on. Wired headphones or your device's own speaker give the cleanest read of the timing. One note on wireless and Bluetooth headphones: they add a small delay before the sound reaches your ears, and in a game measured in milliseconds that can make the beeps feel a touch late. It still plays fine, but for your sharpest runs go wired or use the speaker. If you would rather not, the sync setting can line it back up: nudge the slider or tap calibrate by ear and follow the beeps. How we fixed latency walks through it, and why it is not only about headphones.
Accessibility
Because the game is played by ear, it works with screen readers, and blind players can play it fully. On-screen labels and a live caption describe the state of each round, and every loss has its own sound. An optional vibration mode on Android lets you feel the cue. The trade-off is that the game leans on sound, so a muted or visual-only experience is limited.
Install it
Playing in the browser needs no install at all, and that never changes. If you want Acrobeat as an app, there are two ways. On most phones you can add it to your home screen straight from the browser and play it full screen and offline. On Android it is also on Google Play, the same game with the same scores, as a regular app in your library.
FAQ
Is it free?
Yes. Acrobeat is free to play, with nothing to buy. Any ads simply help keep it that way.
Do I need an account or a download?
No. It runs in your browser with no signup and nothing to install. If you prefer a real app, it is also on Google Play for Android. Same game either way.
What is the daily challenge?
Ten steps, seeded from the date so everyone gets the same puzzle that day, with one scored attempt. You get a shareable result grid, and playing day after day builds a streak.
Why does it need sound?
The cue you copy is the gap between two beeps. Without sound there is nothing to reproduce.
Is there a way to win, or does it go forever?
Free climb is endless, so the goal is to beat your own best level, your peak. The daily challenge is a fixed ten steps, so finishing all ten is a clean win for the day.
Why did I fall when my timing felt close?
Every level tightens the margin for a good match, down to about fifteen thousandths of a second near the top. Close is not always close enough, and that is the whole challenge.
Can I play offline?
Yes. Once it has loaded, and especially if you add it to your home screen, Acrobeat keeps working without a connection.
What devices does it work on?
Any modern mobile or desktop browser.
More about Acrobeat
- How to play: the full manual, with both control schemes, what the peak and drift readouts mean, and how to recover after a fall.
- The science of timing: why your ears resolve time about ten times more finely than your eyes, and why that makes a by-ear game possible.
- The daily challenge: how the once-a-day puzzle is seeded from the date with no server, and where it sits among games like Wordle and Heardle.
- Accessibility: how a fully blind player plays it start to finish, what buzz mode does, and the gaps we are still honest about.
Privacy & legal
Acrobeat is a single-player game with no accounts and no login. Your scores and preferences are stored only in your own browser, and the only outside services involved are Google's analytics and, where shown, ads. The full detail, including what is stored, the cookies involved, and how to opt out of everything, lives on the dedicated privacy policy page.
Contact acrobeat@proton.me with any question about the game or your data.
© 2026 Acrobeat. All rights reserved. Acrobeat, including its source code, audio, and visual design, is proprietary and may not be copied, redistributed, or used to create derivative works without permission. The bundled fonts are used under the SIL Open Font License 1.1: see the bundled license texts for IBM Plex Mono and DSEG. Google Play and the Google Play logo are trademarks of Google LLC.