SYMPTOM · 01
Bass that "booms" until your head aches
Sound piles up between walls and a few frequencies get boosted 8–15 dB — which is why some tracks slam your chest and others lose their bass entirely.
Acouvero · iOS · Free
Every room
Every room
has a voice.
Sweep duration
60sec
Gear required
1iPhone
Add-ons / calibration
0none
Price
$0free
PROBLEM · 01
The same pair of speakers,
The same pair of speakers,
never sounds the same room to room.
SYMPTOM · 02
A "smeared" stereo image
The direct sound reaches your ears first, the wall reflections arrive 4–8 ms later. Your brain merges them — and the vocals slide off-center while instruments float around.
SYMPTOM · 03
A tail that drags on too long
The note ends, but the room keeps ringing for half a second — the tail of one note drags into the head of the next. Drums lose attack, vocals turn mushy, busy passages collapse.
METHOD · 02
Three steps,
Three steps,
and your room makes sense.
No microphone to buy, no cables to run, no decibels to memorise. Place the iPhone where you usually sit — Acouvero handles the rest.
STEP 01 · MEASURE
First, listen.
Your speakers play a 60-second sweep tone — climbing from 20 Hz at the bottom all the way to 20 kHz at the top. The iPhone mic records the whole thing: the direct sound from the speakers, plus every reflection bouncing back from walls, ceiling and furniture.
Duration
60 sec
Your job
Sit still
Output
Raw impulse response
SWEEP · 20 HZ – 20 KHZ
LOGARITHMIC
STEP 02 · ANALYZE
See what's off.
From the recording, Acouvero pulls apart three things: ① which frequencies your room is boosting or burying (frequency response); ② where the reflections come from and how delayed they are (early-reflection map); ③ how long the room keeps ringing after a sound stops (RT60).
Resolution
1/12 octave
Range
20 Hz – 20 kHz
Problem spots
Auto-flagged
FREQUENCY RESPONSE · LP
±15 DB
STEP 03 · OPTIMIZE
Hand you things to do.
Not a wall of numbers — a plan. Move the sofa 30 cm forward. Put a panel on the left wall here. Cut 6 dB at 65 Hz on the sub. Each suggestion comes with a "why"; if you don't care, just do it.
Output
Action list
Priority
Biggest wins first
Cost
From $0
ROOM PLAN · TOP-DOWN
SCALE 1 : 50
IN THE APP · 03
Not a meter. A report for you.
No twenty-knob interface. No jargon pop-ups. Acouvero translates everything it measured into a handful of things you can actually do.
Measuring
Report & plan
3D room
Why it's free ·
WHY FREE
WHY FREE
Room measurement used to be either ridiculously expensive or ridiculously hard. We think it should feel like a speed test — tap once, wait a minute, see what you're actually hearing. Free. Full stop.
Do I need to buy a special mic?
No. We've calibrated every iPhone 12-and-later built-in mic to within ±1 dB. A measurement mic over USB-C / Lightning works too, but it's not required.
Is this just another EQ app?
No. EQ flattens the curve with filters; Acouvero tells you what's wrong physically first. Often a small furniture move beats any EQ — and only then does EQ make sense.
My room is small / cluttered / irregular — does it still work?
Yes. Acouvero doesn't assume a shoebox — the sweep measures the actual sound field. Bedrooms, living rooms, L-shapes, open kitchens — all tested.
Does it upload audio from my home?
No. All signal processing happens on-device. The recording is just sine tones — no voice, no music — and we collect zero audio.
How much will I have to spend on fixes?
Every suggestion is tagged with effort and cost. The first one is almost always $0 — half the problem usually goes away by moving furniture. Panels and EQ come later.
Surround / multi-channel support?
Right now it supports stereo (L/R) and 2.1 (with sub). 5.1 / 7.1 / Atmos are on the way — ETA Q3 2026.
What about Android?
iOS-only for now. With a thousand different mic models in the Android ecosystem, hitting our accuracy target is too costly — we'll revisit down the road.
iOS · App Store
One minute,
One minute,
and you finally hear your room.
Download free on the App Store and start in a minute. No ads, no list-selling.