Room Tuner

Better sound starts at your seat

Your room acoustics app for iPhone.

Hear your room. Know what to change. Room Tuner measures your speakers and room through AirPlay 2, explains bass problems, and guides your next speaker or seat adjustment. Start with one room for free.

Download on the App Store See a sample result  ↓

No special microphone. No account. Audio stays on your iPhone.

For a real room measurement: iPhone with iOS 17 or later and an AirPlay 2 speaker, receiver, or Apple TV. Phone-speaker mode is a demo.

Lounge

Two speakers · Quick reading
74Good foundation
Start with the listening seat

Your seat is catching extra bass around 63 Hz. Move it forward 20–30 cm, then measure again.

The room is part of the system

Great speakers can still sound wrong.

Walls, corners, furniture, and the exact place you sit can pile up one bass note and erase another. Room Tuner makes that invisible effect useful—without turning you into an acoustician.

How it works

Measure. Change one thing. Listen again.

A simple loop that puts the useful answer before the acoustic method.

1

Play a brief sweep

Choose your AirPlay 2 speaker, receiver, or Apple TV. Room Tuner plays the test through the system you actually listen to.

2

Listen from your seat

Hold your iPhone where you normally listen. Its microphone hears how the system and room combine at your seat.

3

Try the next move

Get one practical action for the gear you own—then measure again to learn what changed at your seat.

A result you can act on

The graph is evidence. The next step is the product.

Explore three example rooms. Room Tuner adapts its advice to what it hears and what you can actually move.

Quick look confidence
Not another analyzer full of graphs. A calm coach that tells you what to try next.

Room Tuner begins with placement, setup, and the room itself. EQ comes later—and only when the reading has earned that precision.

Quietly capable

Simple when you want it. Detailed when you need it.

Confidence you can see

A quick reading stays a quick look. Several listening positions earn more trust—and more precise advice.

Quick · Fair · Trusted

Built for your setup

Advice changes for two speakers, a subwoofer, a home theatre, a soundbar, or a desktop system.

Setup-aware

Find your best listening seat

Pro compares 2–6 named seats twice and shows the strongest position, or an honest tie or trade-off when there is no single winner.

New in 1.5 · Pro

A ranked plan, one step at a time

Try the highest-value change first. Room Tuner keeps the method steady so your next reading can answer an honest question.

Physics first · EQ last

Private by design

Audio is processed in memory, on your iPhone. Recordings are never saved, uploaded, sold, or shared.

Read the policy

Measurement files

Use the exact Room Tuner signals.

Download uncompressed WAV masters for Room Tuner measurements and research. Keep the playback chain and volume unchanged while a test is running.

Free test signal

Room Tuner Standard Sweep

The app-matched swept-sine test signal, rising from deep bass to high treble. Use it when Room Tuner’s external-playback instructions ask for the standard sweep.

8 secondsStereo48 kHz / 24-bit WAV2.3 MB
Download standard sweep  ↓ Version 1 · Uncompressed master
Research preview

Reference Test v0.3

The current System Check research candidate, with channel, level, repeatability, programme, and recovery passages. It is a test file—not yet the validated public Edition 1 diagnostic master.

2 min 51.5 secStereo48 kHz / 24-bit WAV49.4 MB
Download reference test  ↓ v0.3 research candidate

Articles & experiments

Practical room-acoustics articles.

Research-backed explanations and repeatable experiments for getting better sound from the system and room you already own. Browse all room acoustics and speaker setup guides  →

Free listening experiment Lossless vs MP3: can you hear the difference? The same music as WAV and MP3, with the labels hidden. Compare 128 and 320 kbps on your own speakers or headphones. Try the blind audio test

Speaker placement

Set a repeatable stereo baseline, then test room size, wall distance and toe-in one change at a time.

Room Tuner speaker setup guide

Start here · complete guide

Speaker placement that actually works.

Read the article  →

New · Compact rooms

Small-room speaker setup, without renovating.

Read the article  →
Speaker distance experiment guide

Quick experiment

How speaker distance from the back wall changes your bass.

Read the guide  →

New · Stereo imaging

Speaker toe-in: find your sharpest stereo image.

Read the article  →

New · Off-centre vocals

Why is your stereo image pulling to one side?

Read the article  →

Bass problems

Work out whether the source, seat or room is responsible before you buy more equipment.

Start here · bass troubleshooting

Why is my bass boomy? Nine fixes that work.

Read the article  →

New · Room acoustics

Room modes: why bass changes when you move.

Read the article  →

New · Improvement strategy

Acoustic treatment vs room EQ: what fixes what?

Read the article  →

New · Missing bass

Why does bass disappear at your listening seat?

Read the article  →

Subwoofer placement

Shortlist feasible subwoofer positions, then check them with repeatable measurements.

Start here · beginner's guide Subwoofer placement 101: where should it go? Three places to try, one fixed listening seat and a simple way to compare the bass. Read the placement guide  →

Go deeper · subwoofer experiment

The subwoofer crawl, without the folklore.

Read the article  →

New · Sub integration

Subwoofer crossover, without guesswork.

Read the article  →

Listening position

Compare practical seats rather than treating one room reading as the answer for every listener.

Start here · Pro Best Seat Find the best listening position in your room. Learn a controlled seat comparison, then see how Room Tuner Pro handles a winner, tie or trade-off. Read the guide  →

Room measurement

Learn the iPhone and AirPlay 2 measurement workflow before you move a speaker or adjust EQ.

Start here · iPhone measurement

How to measure room acoustics with an iPhone.

Read the article  →

New · Honest measurement

What can an iPhone room measurement really tell you?

Read the article  →

Prefer to watch a setup experiment? Explore Room Tuner’s practical hi-fi videos on YouTube.

Explore YouTube  ↗

Free & Pro

Read one room for free. Go Pro for the full coaching program.

Free includes the complete diagnosis, Trusted readings, and your top fix. Pro begins when you want the whole plan, guided experiments, or more rooms.

Free

Read one room

Measure one room as often as you like and make a complete first improvement.

  • Unlimited readings in one room
  • Complete score, chart, and diagnosis
  • Trusted multi-position readings
  • Your top fix, with the reason behind it
  • First and current scores side by side

Pro

The full coach

Work through the whole room, test positions, compare changes, and keep every room.

  • Find your best seat across 2–6 named positions
  • Complete ranked fix plan
  • Guided tuning and remeasurement
  • Measured speaker or subwoofer placement
  • Per-speaker balance and match analysis
  • Exact EQ and export when evidence supports it
  • Unlimited rooms, history, and comparisons

The useful questions

Before you press play.

Is there a free app to measure room acoustics on iPhone?

Yes. Room Tuner lets you measure one room for free using your iPhone microphone and an AirPlay 2 system. Free includes repeated readings, the response chart, a diagnosis and your top recommended fix. Pro adds tools such as comparing listening seats, guided tuning and more rooms. Follow the iPhone room measurement guide to make your first reading.

Is Room Tuner a clap test or a room-dimension scanner?

Room Tuner plays a guided test through your speakers and measures the frequency response at your listening position. It helps with hi-fi setup, uneven bass and practical changes to speaker or seat position. It does not scan room dimensions or replace a dedicated reverberation-time test. See what an iPhone measurement can tell you.

Do I need a measurement microphone?

No. Room Tuner is designed around the iPhone microphone. It is a practical guide rather than a lab instrument, and the app keeps its precision within what that evidence can support.

What do I need for a real room measurement?

An iPhone running iOS 17 or later and an AirPlay 2 speaker, receiver, or Apple TV that plays through the system you listen to. Wired-only, Bluetooth-only, and older non-AirPlay systems are not supported yet. Phone-speaker mode lets you try the experience, but it does not measure your room or bass. Headphones are not supported.

Does Room Tuner record me?

No recording is saved. The microphone input is processed on your device, in memory, into a frequency-response measurement. Audio never leaves the phone.

Will it give me EQ filters?

When a trusted reading supports them and your setup can apply them, Pro can provide cuts-only EQ guidance and export. Room Tuner never recommends boosting a deep null just to make a graph look flat.

Is this only for audiophiles?

No. The opening view uses plain language and one clear action. Detailed charts, confidence, provenance, and export stay available when they help, without turning the product into a different personality.

Room Tuner 1.5 for iPhone

Your room is already telling you what to fix.

Download on the App Store