Lexioo: Advanced English

Fluenten LLC

In-app purchases

About this app

Lexioo helps advanced English learners reach native-level fluency.
If you already understand English but still struggle to sound natural, Lexioo is designed for you. It’s your all-in-one fluency platform powered by AI to sharpen your speaking, writing, vocabulary, and reading—all in real-world contexts.

Built for B2-C1 Learners
Lexioo is not for beginners. It's built for professionals, students, and immigrants who already speak English but want to sound native, get promoted, or communicate effortlessly in any situation.

Writing Coach

Write emails, essays, and prompts freely

Get instant feedback on grammar, word choice, tone, and structure

Play mini writing games to polish your skills with real examples
Write with clarity and confidence.

Real-Time Speaking Practice

Talk to AI personas with different styles and memory

Practice interviews, small talk, meetings, and more

Get pronunciation and fluency tips in real-time
Speak naturally, like you’ve lived abroad for years.

Vocabulary That Sticks

Learn real words and phrases used by native speakers

Track which words you know, half-know, and struggle with

Build your own smart wordbook
Speak precisely and effortlessly.

Read & Understand Native Content

Read real news and articles with one-click sentence simplification

Tap any word or phrase to learn more instantly

Add tricky words to your wordbook in one tap
Stay curious and boost your comprehension.

Why Lexioo?

Designed for the last mile to fluency

Feels like a personal coach, not a textbook

Free to use—no ads, no credit card required

Who uses Lexioo?

Non-native professionals in tech, business, or academia

International students preparing for career success

English learners who are tired of basic apps

Download Lexioo and finally cross the gap from good English to native-level fluency.
No more plateaus. No more feeling stuck. Just real, confident English.

Ratings and reviews

The app is perfect for international students— it helps with academic writing, speaking, and vocabulary for school.

The writing games are perfect for learning in context. I don’t just memorize rules—I apply them.

The app helped me fall in love with English again. I used to see it as a chore—now it’s a fun daily habit.