Most voice apps assume something is wrong with you.
They diagnose, they correct, they compare you to celebrities. They turn your voice into a problem to be solved by next month's update.
Mezzo doesn't. It assumes the voice you have already carries weight — it just hasn't been listened to properly. Not for breath, or pace, or the moment in a sentence where you steady. A voice is something to cultivate, not to fix.
This is voice training for adults who don't want to be coached. Read aloud each day. Listen back. Read again on Sunday what you wrote on Tuesday. The work is quiet, and the work works.
How it works
Thirty seconds, then six weeks.
Mezzo listens to a short passage you read aloud, places your voice in its magnetic register, and writes a six-week correspondence tuned to the way you actually sound.
i.
Read a passage aloud
Thirty seconds of literary prose. Mezzo calibrates to the room first — it listens for the noise floor, asks you to find somewhere quiet if it has to — then records you reading. The audio never leaves your phone.
ii.
Your magnetic register, named
The recording is analyzed on device using the YIN pitch detection algorithm. You're placed in one of six magnetic registers — Linen, Velvet, Smoke, Ember, Honey, Bell — with a five-axis radar of Warmth, Depth, Presence, Clarity, and Prosody. The reveal is named, not numbered.
iii.
Forty-two days of small movements
Six weeks, themed by the work — Breath, Resonance, Warmth, Pace, Prosody, Integration. Each day is five to seven minutes: a guided breath, a passage read aloud, a brief reflection. Wordsworth. Hopkins. Woolf. Passages chosen for the way they read aloud, not for what they prove.
Inside the app
Six screens, six moments.
The opening. The promise of the work, before you do any of it.Calibration. Mezzo listens to the room first, before it listens to you.The reveal. Your register, named — not scored.A daily session. Five to seven minutes of prose, breath, reflection.Sunday. Three measurements. A letter, signed.Home. Six weeks of small movements, in a calendar that doesn't shame you.
The six magnetic registers
Six voices. One of them is yours.
Mezzo's archetypes are ordered by pitch, not by rank. None is better than another. Each names a quality of presence the voice already carries.
LinenAuthority that never raises its voice.165–185 Hz
VelvetA voice that fills a room without raising itself.170–195 Hz
SmokeCloseness without performance.180–205 Hz
EmberA voice that holds attention by the third sentence.195–220 Hz
HoneyA voice that disarms before it persuades.210–235 Hz
BellA voice that reaches the back of the room without strain.225–255 Hz
The Sunday Letter
Once a week, Mezzo writes you a letter.
Three quiet observations about how you read this week — not how many days you completed, not how you ranked. What changed in your breath. Where your pace steadied. The sentence you stayed in longer than the others.
"You read more slowly this week, which we noticed. The pauses fell where they should — on the second comma of Sunday's passage, between the two adjectives in Tuesday's. There is a kind of confidence in slowness, and we suspect you've found a little of it."
A short editorial note follows. One observation about your cohort. No streaks. No leaderboards. No score. Reading the letter is the ritual.
If you opt in, a reminder arrives once a week. Mezzo will never page you for missing a day.
— Mezzo
A note from the maker
Why I built this.
I built Mezzo because I couldn't find a voice training app I'd recommend to someone I respected. The category is loud — celebrity comparisons, streak counters, generic curricula, software that wants to fix you before it understands you.
I wanted something quieter. A six-week correspondence with literary prose at the center of it. Real on-device analysis. No accounts, no servers, no profile-building. The kind of app you can pick up in the morning without bracing yourself.
If your voice already does work in the world — in meetings, in classrooms, on stage, on a recording — Mezzo is for you. It assumes you have something worth listening to. The forty-two days are about helping you hear it.
— the maker
What's in, what's out
Deliberate restraint.
What you won't find
Streaks, badges, completion percentages
Motivational quotes
Comparisons to other users
"You sound like [celebrity]"
Notifications that shame you for missing a day
Fake countdowns or hidden auto-renewals
Retention pop-ups before you've thought about leaving
What Mezzo does
Thirty-second baseline read, analyzed on device
Your archetype, magnetic register, and five-axis radar
Forty-two days of literary passages with focus prompts
Editorial feedback rooted in your recording, never in raw numbers
A weekly Sunday Letter, signed
An optional Sunday reminder, local to your phone
A share card you can send — if you want to
Free practice on any passage you want to return to
Questions, answered honestly
A few things people ask.
Where do my voice recordings go?
Nowhere. They stay on your phone, in the app's sandbox. There are no accounts, no servers, no uploads. The analysis runs on your device using the YIN pitch detection algorithm. If you delete the app, every recording goes with it.
Is there a free trial?
No. We don't run free trials in v1 — they correlate with the dark patterns this app exists to avoid. You can cancel at any point in your App Store account. There are no auto-renewal traps, no hidden retention loops.
Will Mezzo work for my voice?
Mezzo's six archetypes cover the 150–280 Hz pitch range — broadly, adult female and adult male in the upper half. If your voice falls outside that band, the app will tell you, and you can join the waitlist for an expanded version. We're working on lower and higher registers for a future release.
What happens after the six weeks?
The forty-two days stay with you. You can revisit any day's passage from the calendar and listen back to your past recordings — a quiet listening diary builds itself as you work. Free practice mode lets you read any passage on demand. A post-foundation challenge week is in development for the first update after launch, with more themed weeks to follow.
Does Mezzo use AI?
Not in the generative sense. There is no AI voice synthesis, no AI-generated feedback paragraphs. The pitch analysis uses a classic signal-processing algorithm; the feedback is editorial, hand-written, and chosen based on what your recording actually does — pace, pitch variation, register relative to your archetype. Every word the app says to you was written by a person.
Do I need an account?
No. There is nothing to sign up for inside the app. The waitlist on this page is the only place we collect an email — and only because you've asked us to let you know when v1 ships.
Is it on Android?
Not yet. Mezzo ships iOS-first because the audio pipeline is tuned to AVFoundation; a faithful Android version is a year-two question, not a launch-week one.
I'm a coach / teacher / actor — can I use Mezzo professionally?
Mezzo is built for personal practice, not for client work. It doesn't export sessions, doesn't share data, doesn't have a multi-user mode. That said, plenty of voice professionals use it on themselves. Write to us if you have a specific use case — we want to hear it.
Pricing
A single price, plainly.
Subscription pricing, with the work front-loaded so the program ends on time. No tiers. No upsells. No data harvesting in lieu of payment.
Weekly
$12.99
per week
Yearly
$59.99
per year
Cancel any time in your App Store account. No free trial. No predatory tactics. Prices are in US dollars; App Store handles currency for your region.
Be the first to know
Mezzo opens soon.
Leave an email and we'll write once, on the day v1 lands on the App Store. We won't send anything else. We won't share the list. There is no newsletter.
