FluentIn
Speak like a local, anywhere
Only for iPhone
Free · In-App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
School taught you standard English. FluentIn teaches you how people on that street — and in that industry — actually talk.
You already know the words. What you miss is the local version: "on line" instead of "in line", "deadass" instead of "seriously", "let me get a regular coffee" instead of a full sentence with please. FluentIn drills exactly that gap.
HOW IT WORKS
• Read the situation in your language (English or 繁體中文).
• Hold the button and say it the way a local would — or tap the blanked word and type it.
• Get one of three verdicts: Local — that's how they say it. Close — meaning right, wording not local. Not it.
• Local or Close reveals the card: the phrase, who says it, where it's safe, where to avoid it, where it came from — and, for many phrases, a real clip of someone saying it.
• Not it? The answer stays hidden. Try again, ask a friend (share the question as a card — to a real friend or your AI assistant), or pass for now. FluentIn is not a question bank to race through: going to find the answer is what makes it stick.
WHAT MAKES IT DIFFERENT
• Every phrase carries a social card: age, community, register, the rooms where it lands and the rooms where it doesn't.
• Real speakers, not voice actors: hear the phrase in the wild via YouTube.
• A judge that knows the difference between "right meaning" and "right wording" — the feedback textbooks can't give.
• Five hint levels, from one blanked key word to nothing at all. Complete a pack at a harder level and its badge upgrades: green, bronze, silver, gold, dark.
PACKS
• Fluent in New York — bodega, stoop, yerrr, the train, OD, brick, on line…
• Fluent in Silicon Valley — LGTM, ship it, on call, runway, TC…
• Fluent in Wall Street — priced in, bips, comp day, the staffer…
• Fluent in Coffee Shops — order like a regular (unaffiliated with any chain).
• Fluent in Tainan and Fluent in Shanghai — the local Mandarin: 牛肉湯、府城、阿拉、拎得清… (answers in Mandarin).
More cities and industries are on the way.
For intermediate and advanced learners: people moving to a city, joining a new workplace, or tired of missing the joke.
Speech recognition runs on your device via Apple's speech framework. Optional: add your own Gemini API key in Settings and an AI judge explains the grey-zone answers. No account. No FluentIn servers. Nothing sold.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
• Starter Village: 20 free phrases from every pack. Clear it to unlock the rest.
• Unlock any pack forever with a one-time purchase — no subscription.
• New pack: Fluent in Boston.
• Optional SenseVoice engine (download in Settings) for far better Chinese, Cantonese, Japanese and Korean recognition.
• Progress now backs up to iCloud.
The developer, Jiayan Lin, 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Jiayan Lin
- Size
- 59.7 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
- Age Rating
9+
- 9+
- Infrequent
Profanity or Crude Humour
- In-App Purchases
Yes
- Fluent in Shanghai ₺249,99
- Fluent in Tainan ₺249,99
- Fluent in Coffee Shops ₺249,99
- Fluent in Boston ₺249,99
- Fluent in Wall Street ₺249,99
- Fluent in New York ₺249,99
- Fluent in Silicon Valley ₺249,99
- Copyright
- © 2026 Jiayan Lin