SyncMouth: English Pronounce
Sync Mouth to Native English
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Pronunciation is fixed with your mouth, not your ears. SyncMouth reads how your mouth moves through the front camera, combines it with speech assessment, and scores your pronunciation from both sides — the sound and the shape. One phoneme at a time, until your mouth moves like a native speaker's.
■ What makes SyncMouth different
- See your mouth: Face tracking captures how your lips, jaw and mouth move while you speak, in real time. You can see exactly where you differ from a native speaker, instead of just being told "that doesn't sound right."
- Scored on sound AND shape: Speech assessment and mouth-shape assessment are combined into one score, so you find the cause an audio-only app can never show you.
- Built up from phonemes: You start from phonemes, the smallest units of English sound, not from full sentences. Clear one and the next unlocks, so you always know what to work on next.
- Native model videos: Every phoneme comes with a video of a native speaker's mouth plus hints about tongue and lip position, so you know exactly what to copy.
- Real words, real scores: After each phoneme you practice words containing that sound and get a score, so progress is a number, not a guess.
■ Made to keep you practicing
- Streaks that record every day you show up
- A lives system that gives your daily practice a rhythm
- Leaderboards to compete with other learners
- Three game modes: Word Practice, a 30-second Time Attack, and a three-life Flawless mode
■ Who it is for
- Learners who keep getting corrected but do not know how to fix it
- Learners who found audio-only pronunciation apps not enough
- Anyone preparing for a speaking test or a conversation lesson
- Parents supporting a child learning phonics
■ Before you start
- Requires an iPhone with face tracking (front camera) and a microphone
- The app uses your camera and microphone while you practice. Mouth-shape data is numeric; facial images themselves are not stored or transmitted
- Core features are free. Some content is available through in-app purchases
Start today, and change your pronunciation from the mouth up.
Terms of Use: https://syncmouth.com/terms/
Privacy Policy: https://syncmouth.com/privacy/
Support: https://syncmouth.com/contact/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Minor bug fixes and stability improvements.Minor bug fixes and stability improvements.
The developer, SyncMouth Labs, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Contact Info
- User Content
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- SyncMouth Labs
- Size
- 30.6 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Contains
User-Generated Content
- In-App Purchases
Yes
- Unlock All English Phonemes $9.99
- Streak Freeze x3 $4.99
- Streak Freeze x1 $1.99
- Life Refill x5 $3.99
- Life Refill x1 $0.99
- Copyright
- © 2026 SyncMouth Labs