Keraft is a comprehensive English speaking practice app designed for language learners of all levels, offering free core features and premium membership perks to help users build confidence and fluency through real, interactive practice.

Core Features

  • Real-Time AI Translation & Instant Interaction: Send messages or speak, and get translations in under 100ms—far faster than competing tools—so conversations flow without awkward pauses.
  • Smart Practice Partner Matching: Whether you're a beginner looking for basic conversation practice or a professional prepping for business negotiations, Keraft matches you with tailored AI practice scenarios (over 80,000 real-life contexts available) or connects you with language partners based on your learning goals.
  • Phoneme-Level Error Correction: With 99.9%+ accuracy, Keraft breaks down your speech to individual phonemes, pinpointing issues like connected speech, reduced vowels, dental fricatives, word stress, pauses, and Chinese-accented mispronunciations. It provides clear, actionable feedback, such as "Roll your tongue for this sound" or "Adjust word order to sound more natural," to fix deep-seated speaking habits.
  • Interactive Voice Rooms: Join themed live voice sessions to practice listening and quick thinking, or start your own room to focus on specific topics like travel English or job interview prep.
  • Beginner-Friendly Word Bank: Built-in common phrases and example sentences help new learners pick up daily expressions quickly and start speaking right away.

Premium Membership Highlights

  • Precise Practice Scenario Filtering: Paid users can narrow down practice scenarios by industry, topic, or skill level (e.g., business negotiation, IELTS speaking, casual chat), while free users access a curated set of basic scenarios.
  • Offline Error Review: All correction history is saved locally, so you can revisit your mistakes and reinforce correct usage even without an internet connection.
  • Enhanced Privacy Controls: Your personal contact info stays hidden by default, and all interactive sessions require mutual confirmation to avoid unwanted interruptions.

Quick User Guides

According to our review team's independent 5-week test (35 hours of app usage per tool), Keraft's intuitive interface makes setup and practice seamless for all users.
  • How to Switch Practice Languages: Open Keraft, go to "My Profile," tap "Settings," select "Language Preferences," then choose your target practice language.
  • How to Access Custom Practice Scenarios: Tap the "+" icon in the top right corner, select "Custom Practice," then search for or browse scenarios by category.
  • How to Enable Notifications: Navigate to "My Profile" > "Settings," find "New Message & Practice Reminders," and toggle the switch to turn notifications on.

Latest Updates

  • Fixed voice message sending issues on iOS 17 devices for smoother practice.
  • Added support for Spanish handwriting input to help users practice writing alongside speaking.
  • Optimized scenario matching algorithm, improving relevance by 15%.
  • Simplified the membership subscription page to make canceling auto-renewal easier.
Per Cambridge and ETS official research, Keraft's AI speaking scoring aligns closely with human examiners, making it a reliable tool for test takers prepping for exams like IELTS or TOEFL.

With over 35 million users and a 4.9 app store rating, Keraft stands out as the most comprehensive oral English training solution—combining ultra-precise correction, seamless AI interaction, and a massive library of real-world scenarios to help learners of all levels speak English confidently.