Lexicon — AI Language Practice
Chat, Learn & Speak Fluently
Only for iPhone
Free · In‑App Purchases
iPhone
New: 30+ AI characters with unique personalities. Practice real conversations in English, Spanish, French & German — stress-free, 24/7
Stop studying languages. Start speaking them.
Forget about the language barrier and the fear of making mistakes. With Lexicon, you can practice English, Spanish, French, or German in live AI chats. It feels just like texting a native-speaking friend, but without the anxiety, available anytime you want.
REAL CONVERSATIONS, NOT TEXTBOOKS
Chat with 30+ AI characters, each with their own unique personality and backstory. Discuss fashion with Sloane, debate tech with Dan, or gossip with Lola. Every conversation adapts to your level — no scripted dialogues or robotic replies.
CAN'T FIND A PARTNER? CREATE ONE
Build your ultimate conversational partner: set their personality, profession, and tone. Prep for a job interview, practice ordering food abroad, or just chat about your hobbies in your target language.
EVERY MISTAKE IS A STEP TOWARD FLUENCY
Lexicon checks your messages in real time and explains your mistakes in your native language. It doesn't just say "wrong" — it shows you WHY it's incorrect and HOW to sound natural.
UNDERSTAND CONTEXT, NOT JUST WORDS
Tap any word in the chat to get more than just a translation. Get full definitions with examples and nuances. Different meanings are separated so you always grasp the exact sense in your specific context.
SAVE WORDS. LEARN THEM. REMEMBER FOREVER.
Add words and phrases to your custom decks. Review them with smart flashcards based on spaced repetition — the scientifically proven method used by top polyglots worldwide.
EVERY RULE, ALWAYS AT HAND
Got stuck? Open the built-in grammar library, structured by CEFR levels (A1–C2). Clear, bite-sized theory means the answer is always just one tap away.
SMARTER THAN EXPENSIVE TUTORS
A whole month of active practice in Lexicon costs less than one hour with a private tutor. Practice in a comfortable environment where it's safe to make mistakes.
YOUR PRIVACY MATTERS
Ad-free. No data selling. Your conversations are strictly private.
• Languages to learn: English, Spanish, French, German.
• Interface languages: Russian, English, Spanish, French, German, Arabic, Chinese, Hindi, Japanese, Portuguese.
Download Lexicon today and start speaking fluently!
Privacy Policy: https://dub.sh/lex/privacy
Terms of Use: https://dub.sh/lex/terms
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Aleksandr Kopachev, 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
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Aleksandr Kopachev
- Size
- 55 MB
- Category
- Education
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later.
- iPhone
- Languages
English and 9 more
- English, Arabic, French, German, Hindi, Japanese, Portuguese, Russian, Simplified Chinese, Spanish
- Age Rating
9+
- 9+
- Infrequent
Profanity or Crude Humor
Mature or Suggestive Themes
- In-App Purchases
Yes
- Pro 1 Year (-40%) $59.99
- Pro 1 Year $119.99
- Pro 1 Month (-40%) $5.99
- Pro 1 Month $9.99
- Copyright
- © 2026 Aleksandr Kopachev