For listeners, musicians, sound healers, and frequency-curious humans with an iPhone.

Play Any Song On Your iPhone In 432 Hz, 528 Hz, Or Any Solfeggio Frequency — In Real Time.

Across YouTube, YouTube Music, Apple Music, and Spotify — all through Safari. On your iPhone, iPad, and Mac. The patented retuning engine behind Music ReTuner — now available as a Safari extension for a one-time $99.99 launch price.

Get Music ReTuner — $99.99 on the App Store

Safari extension · iPhone, iPad, Mac · 6 seats included · One-time payment · Launch price — won't last

Watch a song get retuned from 440 Hz to 432 Hz in real time, mid-playback, in Safari. No download. No separate player. No sketchy YouTube re-upload.

I had a habit I'm slightly embarrassed to admit.

For about five years, every time I fell in love with a song, the next thing I did was open YouTube and type the song name followed by "432 Hz."

Then I'd scroll through whatever came back. Some uploads looked real. Some looked clearly faked. Most were uploaded in 2014 by an account with no profile picture and a thousand views.

I'd pick the one that looked least suspicious and hope it had actually been retuned.

Apple Music? Forget it. There's no 432 Hz catalog. Spotify? Same story. The entire commercial music industry is locked at A = 440 Hz tuning. If you want a song at the frequency that actually feels right to you, your options are: hunt down a stranger's YouTube re-upload, or accept what the labels decided in 1955.

If you've ever done this — typed "[song name] 432 Hz" into a search bar at midnight, hoping the result is real — you're not alone. A lot of people have.

This page exists because I got tired of it and built the thing that fixes it.

If you want to listen to your music in 432 Hz today, you have two real options — and both have a hard limit.

"432 Hz" uploads on YouTube and Spotify

Mislabeled and unverifiable. There's no way to tell whether an upload was actually retuned or just had a tone overlaid on top of the original. The good ones disappear when channels get struck. You're trusting strangers.

Solfeggio frequency player apps

Apps like Player Plus and SFP work well for music files you've imported yourself — and we make some of them. The limit is the same across the category: they only play the library you've built. Your Apple Music subscription, your Spotify playlists, your YouTube queue — all out of reach.

You're not crazy. The problem is real. Until now, there hasn't been a way to retune the streaming music you actually listen to.

The "432 Hz" tracks on YouTube and Spotify are mislabeled and unverified.

Type "432 Hz music" into YouTube and you'll find thousands of uploads. Some are real. Most aren't. At best, the uploader took an original track at 440 Hz, slapped a pure 432 Hz tone underneath it, and called it retuned. The song itself was never touched. You're listening to the original at 440 Hz with a low hum behind it.

You have no way to verify. The waveform says one thing, the title says another, and unless you have the master to compare against, you're trusting a stranger's upload from 2014. That's the entire 432 Hz internet today — fragmented, mislabeled, unverifiable.

The real fix is to retune the master stream itself, in real time, as you play it. Not a tone laid on top. Not a file you have to import. The actual streaming audio — shifted as it plays.

Doing this cleanly — pitch-shifting every note in real time, while audio is streaming, without artifacts — is genuinely hard. It's a serious digital signal processing problem. It took years of failed prototypes to solve.

When we figured it out, we patented it.

US Patent 11,836,330

The real-time rate adjustment and tuning toggle that make this possible.

The patent covers the audio rate-change method that retunes music in real time, plus the toggle that lets you switch the target frequency with a single tap. Together they're what makes it possible to retune a live stream — instead of forcing you to hunt down pre-tuned files.

SYQEL ships the products that use it — Music ReTuner for iOS, the Music ReTuner browser extension, and Retuner Pro on the desktop.

View patent

Music ReTuner for iOS

Introducing Music ReTuner for iOS.

A Safari extension that retunes music in real time on iPhone, iPad, and Mac. The newest member of the Music ReTuner family. The same patented retuning engine that powers our $299 desktop product — now built for the device you actually carry around.

One App Store purchase installs the extension across all three. Up to six family members through Apple Family Sharing. Every Solfeggio frequency, plus 432 Hz, plus a Custom Hz field for whatever specific tuning you're chasing.

What's inside Music ReTuner for iOS

Safari on iPhone, iPad, Mac

One App Store purchase installs the extension on all three.

4 streaming services

YouTube, YouTube Music, Apple Music, Spotify.

Every Solfeggio + 432 Hz

174 · 285 · 396 · 417 · 528 · 639 · 741 · 852 · 963 Hz, plus 432 — one tap each.

Set your own A4

Custom Hz field — type any target frequency.

6 family seats

Included via Apple Family Sharing.

Patented engine

Real-time, in-stream retuning. Not a tone overlay.

Here's where the math gets interesting.

The Music ReTuner browser extension sells at $299 — a 6-device license that covers Chrome, Edge, Firefox, Opera, and Brave. That price has been stable for years. People buy it every week. The patent isn't a sticker — it's the engine.

Launch promotion · won't stay here forever

~~$299~~ $99.99 Launch price · Safari extension for iOS · 1/3 the desktop price

Same patented engine. Same real retuning. Same Solfeggio catalog plus 432 Hz plus a Custom Hz field. 6-seat entitlement via Apple Family Sharing.

Why so much cheaper? Three reasons. Apple takes a meaningful cut of every App Store sale. iOS users price differently than desktop power users. And $99.99 is a launch price — we want Music ReTuner for Safari in as many hands as possible while we're still launching. The price will go up.

Most retuning apps charge $9.99/month per person. For a family of six, that's $720 every year, forever.

Music ReTuner for iOS is $99.99 once, at launch. Six people. Three Apple devices. No subscription. Ever.

Get Music ReTuner — $99.99 on the App Store

One-time payment · 6 seats included · iPhone + iPad + Mac

Need Music ReTuner on a different platform?

The patented engine is available everywhere you listen. iOS is the affordable entry point. The desktop browser extension covers your laptop and PC browsing. Retuner Pro is the native desktop app for power users — it retunes any music app on your computer and works offline.

Launch price · works on iPhone & iPads

Music ReTuner for iOS

$99.99 one-time · launch

Type: Safari extension
Seats: 6 via Apple Family Sharing
Runs on: iPhone, iPad, Mac (Safari)
Retunes: YouTube, YouTube Music, Apple Music, Spotify — in Safari
Mode: live streaming only
Custom A4: yes
From: Apple App Store

Get on the App Store

Desktop browser

Music ReTuner Browser Extension

$299 lifetime

Seats: 6 device activations
Runs on: Chrome, Brave, Opera, Microsoft Edge, Firefox
Retunes: YouTube, YouTube Music, Apple Music, Spotify — in your browser
Mode: live streaming only
Custom A4: yes
From: our checkout + browser store install

See Browser Extension

Native desktop · System-wide audio

Retuner Pro

$299 lifetime · 2 device activations

The most powerful Music ReTuner product. A native desktop app that retunes any music app on your machine.

Runs on: Mac (Apple Silicon + Intel), Windows
Retunes: any app — Spotify, Apple Music, YouTube, Tidal, VLC, Amazon Music, your DAW
Mode: works offline, including local files
Seats: 2 device activations per license
Custom A4: yes
Refund: 7-day money-back guarantee on lifetime

Get Retuner Pro retunerpro.com

Already own the browser extension or Retuner Pro? The iOS App Store purchase is independent — add it for $99.99 to extend your setup to your iPhone, iPad, and Mac Safari.

Already in use on Chrome — here's what users say.

The Safari extension launching on iOS uses the same patented engine already running on Chrome. Verified reviews from the Chrome Web Store listing.

Super easy to install and to use! All the Solfeggio frequences to choose from. Just clicking though the different frequencies is quick and easy. I can listen to the music how I want to. I highly recommend it. Great extension! Love it!

Dean Chrome Web Store review

I'm really glad that this Chrome extension exists. I use it almost daily for YouTube. When you set different frequencies, you can immediately hear a change in pitch with music. It takes a bit of getting used to at first, but after just a few seconds, you don't even notice it anymore — you just feel the effect of the frequency. I don't notice any difference when it comes to voices. Best regards from Germany!

Stefanie Lange Chrome Web Store review · Germany

Works great

Krzysztof Chrome Web Store review

Woorks Just great

Joe Chrome Web Store review

Try it. If it's not what you expected, you get refunded.

On iOS, Apple handles all App Store refunds within 14 days of purchase. The process takes a couple of minutes through your Apple ID account. We've never blocked or contested a refund.

On the Music ReTuner browser extension and Retuner Pro, we offer a 7-day money-back guarantee on lifetime purchases — email us within seven days and we refund you.

You don't have to take our word for whether retuning feels different — you have a real window to test it on the music you actually listen to.

Frequently asked questions

Does this really work with Apple Music and Spotify?

Yes — through their web players in Safari. Both platforms have full-featured web players, and Music ReTuner retunes whatever's playing. It doesn't work inside the native Apple Music or Spotify apps (Apple doesn't allow extensions to access other apps' audio), but most users adapt to Safari playback quickly and many prefer it.

Will I notice a difference in sound quality?

The retuning is high-fidelity real-time pitch shifting. On most music, the result is indistinguishable from a natively recorded 432 Hz (or other frequency) master, with the pitch shift the only audible change.

Can I set my own A4 / custom frequency?

Yes. Every Music ReTuner product — the iOS Safari extension, the desktop browser extension, and Retuner Pro — has a Custom Hz field in addition to the preset Solfeggio frequencies and 432 Hz. Type in any A4 target you want.

Why is iOS $99.99 when Retuner Pro is $299?

They're different products with different scope. Music ReTuner for iOS is a Safari extension — it retunes audio playing in the browser (YouTube, YouTube Music, Apple Music, Spotify on the web). Retuner Pro is a native desktop app for Mac and Windows that retunes any music app on your computer, regardless of what's playing the music. On top of the scope difference, $99.99 is also our launch price for iOS — the introductory rate to get Music ReTuner for Safari into as many hands as possible during launch.

Is $99.99 the permanent price?

No — $99.99 is a launch promotion. We're using this introductory price to get the Music ReTuner Safari extension into as many hands as possible while we're still launching. The price will go up. If you're considering it, locking in your one-time purchase at the launch price is the cheapest it will be.

How does the 6-seat entitlement work?

On iOS, it's standard Apple Family Sharing. When you purchase from the App Store, anyone in your Apple Family group (up to 6 people total) can install and use it on their own devices at no additional cost. The Music ReTuner browser extension license at $299 also covers 6 device activations — useful for households with mixed Mac and Windows machines, or for sharing across personal and work computers. Retuner Pro at $299 is a 2-device license.

Can I use it offline?

The Music ReTuner browser extensions (Safari, Chrome, Edge, Firefox, Opera, Brave) work with live streaming — they need the streaming source to be playing in your browser. Retuner Pro is different: it's a native desktop app, so it works offline on local files and any music app on your Mac or Windows machine.

Is this a subscription?

No. $99.99 one time. No recurring charges. Lifetime updates within the major version.

Do you have a desktop or Chrome version too?

Yes — see the "Choose Your Platform" section above. Music ReTuner Browser Extension ($299 lifetime, 6 device activations) covers Chrome, Brave, Opera, Microsoft Edge, and Firefox. Retuner Pro ($299 lifetime, 2 device activations) is a native desktop app for Mac and Windows that retunes any music app on your machine and works offline. iOS, the browser extension, and Retuner Pro are independent purchases — pick whichever fits how you listen.

Who built this?

SYQEL INC — the company behind Music ReTuner for iOS, the Music ReTuner browser extension, and Retuner Pro on the desktop. Music ReTuner is the result of about five years of DSP work and many failed prototypes before getting the audio quality right.

Music ReTuner. Patented retuning, on the device you actually carry.

Get Music ReTuner — $99.99 on the App Store

One-time payment · iPhone + iPad + Mac · 6 seats included · 14-day Apple refund window

P.S. — If you've spent any amount of time hunting for 432 Hz uploads on YouTube, this is the thing that ends that habit. One purchase, all your Apple devices, six seats in your family, every Solfeggio frequency plus Custom Hz, no subscription. The same patented engine we sell at $299 on the desktop browser extension and $299 on Retuner Pro. iOS is the $99.99 entry point. If it doesn't change how you listen to music, Apple refunds you in two weeks.

P.P.S. — Already a desktop browser extension user? The iOS purchase is independent and adds your iPhone, iPad, and Mac Safari to your existing setup for $99.99.

Get Music ReTuner — $99.99 on the App Store