modi-fi

Voice training with live feedback — built for gender-affirming goals, ready for any voice you're working toward. Find the voice that sounds like you, and keep every second of it on your device.

Coming soon to the App StorePrivacy policy

Live monitor

Three signals, one glance

Open the monitor and just speak. modi-fi analyzes your voice in real time and draws what it hears — no recording, no waiting.

Pitch

Fundamental frequency traced live, with note detection and your session's low–high range.

Decibel

Loudness over time — practice projection and consistency, smooth or syllable by syllable.

Resonance

Formant tracking shows where your voice sits — brighter or darker — as you adjust it.

Guided training

Exercises that listen back

Warm up, then drill pitch, resonance, intonation, and everyday speech. Pick a feminizing, masculinizing, or androgynous goal and every exercise tunes its targets to where you're headed.

PitchHolds & glidesSustain steady notes, follow moving targets, and widen your comfortable range.

ResonanceYawn-sigh, smile placement, vowel spaceShift brightness against a live target band on the vowel plane.

IntonationStatements, questions, melodyPer-word pitch contours — practice rises, falls, and melodic range.

Connected speechRead aloud, free speech, conversationReal sentences, with time-in-target and drift across the whole passage.

Around the practice

Everything between sessions

Coming soonLearnShort lessons on anatomy, health, and technique — arriving in a free update.

Recording libraryRecord a baseline on day one, save clips as you go — everything stays on your phone.

CompareOverlay any two clips — pitch and resonance traces plus side-by-side stats, shown as neutral deltas.

ProgressTrends, streaks, and milestones across every metric you train.

Voice diaryNotes and moods attached to sessions — how it felt matters as much as the numbers.

Your goalFeminizing, masculinizing, or androgynous — set it once and every target, envelope, and phrase adapts. Gentle reminders if you want them.

Your voice never leaves
your device.

Your voice is personal — for many of us, training it is too. modi-fi has no servers. Audio is analyzed on your iPhone in real time and never recorded, stored, or transmitted unless you save a clip — and saved clips stay on your phone too. Accounts, history, diary: all local. An optional app lock keeps the app itself private. Delete the app or tap Delete All Data, and it's gone. No one learns you're training your voice — not even us.

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Support

We're a small team. Email works.

Contact

Bugs, questions, feedback: support@modi-fi.app. We reply within a few days.

Requirements

iPhone with iOS 17 or later. Microphone access is used only for live analysis, only while the app is open.

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