
Ossiato: Stutter & Stammer
DAF speech fluency & call prep
0 ratings
Free
In-App Purchases
Rating summary
About
Ossiato is a pocket tool that helps you speak more smoothly right now — and practise every day so you can speak confidently without it.
Put on headphones and tap once. You hear your own voice with a short delay (DAF) and, if you like, a slightly lower pitch (FAF). Many people who stutter find their speech flows more easily with this kind of feedback. It keeps working with the screen locked — in conversations, presentations and interviews.
ONE CALM BUTTON
• Presets for conversation, presentations, calls and practice — switch in a second.
• Quick adjust: delay and pitch sliders right on the main screen.
• Live Activity, Control Center, Action Button and Apple Watch to start and stop without unlocking.
HONEST LATENCY
• Ossiato measures your headphones and shows the delay you actually hear.
• Wired headphones give the shortest delay; AirPods and other Bluetooth headphones work too.
A SKILL THAT STAYS
• An 8-week programme, 10–15 minutes a day: reading aloud, gentle onsets, stretched speech, free speaking.
• Support is reduced step by step so the skill carries over into everyday speech.
PHONE-CALL TRAINER
• Rehearse booking a doctor, talking to a courier or answering a recruiter.
• Choose a patient, hurried or clarifying caller. Delayed feedback can fade out during the call.
PROGRESS YOU CAN HEAR
• Your own ratings, pace and pauses, week by week.
• Listen to the same text a month ago and now.
PRIVATE BY DESIGN
• Audio is processed on your iPhone. Recordings never leave the device. No account, no ads, no tracking.
OSSIATO PRO
Free: Live DAF with no time limit, the Conversation preset, three exercises, three practice calls a week and 7 days of progress. Ossiato Pro unlocks pitch shift (FAF), masker and metronome, all presets and your own, the full 8-week programme and exercise library, unlimited practice calls, full progress with recordings, Control Center, Action Button and Apple Watch: yearly with a 7-day free trial, monthly, or a one-time lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period; manage them in your Apple ID settings.
Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy: https://evgeniybruchkovskiy.github.io/ossiato-legal/privacy.html
Ossiato is a practice tool, not a medical device, and does not replace working with a speech-language professional. iOS does not allow apps to change the sound of real phone calls — that's why Ossiato includes a call trainer.
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What's New in Ossiato
1.0.1
October 5, 2026
Clearer store page and a few small improvements. After a session that felt smooth, Ossiato may now ask once whether you'd like to rate it — it really helps other people who stutter find the app.
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Subscriptions & In-App Purchases
Ossiato Pro Yearly
All Pro features, billed yearly
$39.991 Year
7 Days trial






