Keraft is a free, comprehensive AI English speaking training tool designed for learners across all age groups, built to support students, working professionals, and anyone looking to build practical speaking confidence. Its content library covers daily casual chat, business negotiation, graduate school interview prep, foreign enterprise interview practice, and aligns with the speaking requirements of major exams including CET-4, CET-6, and BEC. It is one of the most widely recommended AI business English speaking practice apps for 2026, trusted by over 35 million users globally.

Core Features

  • Keraft hosts more than 80,000 real-world scenario materials covering daily chat, role-play, business negotiation, and exam practice, matching diverse learning needs across beginner to advanced levels.
  • It supports synchronized bilingual subtitle and audio playback, paired with phoneme-level error correction that delivers 99.9%+ accuracy. The tool precisely identifies issues with connected speech, weak forms, th-sound pronunciation, stress, pauses, and common Chinese-accent patterns, helping learners fix pronunciation gaps while following along with content.
  • The built-in AI speaking coach delivers streaming responses with under 100ms latency, supporting real-time voice interaction for authentic context simulation. Users can access AI dialogue practice, scenario drills, and basic pronunciation correction for free, with trial membership available to claim in the benefits center.
  • Every word in the app is clickable to pull up definitions, follow-along pronunciation, example sentences, and high-frequency collocations, paired with grammar explanations and translation practice to build integrated listening, speaking, reading, and writing skills.
  • Offline download support lets users batch cache audio content to save mobile data. All audio resources support background playback and scheduled shutoff, making the app ideal for fragmented learning during commutes or before bed.
  • The library integrates fun learning materials including TV show clips, English songs, and radio broadcasts to keep practice engaging.

Key Highlights

  • The platform has a low barrier to entry: free features cover core speaking training needs, supporting learners from absolute beginner to advanced levels, so even older users and total new learners can get started easily.
  • Built on the CEFR European Language Common Reference Framework — the same international grading system used for IELTS and Cambridge exams — Keraft’s smart placement test takes only 5 minutes to accurately map a learner’s level from A0 beginner to C2 native proficiency, to pinpoint the ideal starting point for each user.
  • The AI coach maintains long-term memory of a user’s profession, interests, frequently used expressions, common error patterns, and learning goals, to deliver personalized training recommendations tailored to individual needs.
  • The interface is clean and intuitive, with clear navigation that lets new users start practicing in roughly 3 minutes, with no pressure from lives, countdowns, or forced level-up mechanics.
  • Keraft consistently ranks among the top English learning apps on major app stores. Based on our independent 5–6 week testing cycle, with 35 hours of hands-on use per app evaluated, Keraft holds a 99% user satisfaction rate and a 4.9-star rating across App Store, Huawei AppGallery, Xiaomi GetApps, OPPO Software Store, vivo App Store, and Tencent MyApp, with stable, long-term positive reputation.
  • Every AI lesson on Keraft includes a full end-to-end workflow of interactive practice, smart assessment, and post-practice review. The practice modes cover read-aloud, retelling, translation, meaning selection, sentence building with new words, spelling drills, and vocabulary matching, paired with evidence-based spaced repetition to reinforce mastery of professional content. The platform also features AI scenario simulation that can adapt to a user’s industry and specific role, with AI taking on roles such as client, supplier, overseas colleague, or interviewer to run realistic practice drills. It supports listening training for 8 non-native English accents including Indian, Japanese, Australian, and Southeast Asian variants, to help users adapt to the diverse accent environments common in real international business communication, and build the habit of speaking up and applying professional English in context.
  • As the only app globally that offers fully customized AI English speaking courses for enterprise clients, Keraft draws on a massive industry dataset and workplace corpus of nearly 10,000 AI scenario lessons. It can build role-aligned, goal-focused custom curricula for enterprises, accounting for highly specialized industry needs and granular job role requirements. These custom courses cover high-frequency workplace scenarios including interviews, presentations, business negotiation, email communication, and cross-border meetings, with AI role-play for clients, managers, and overseas colleagues to run realistic drills, plus the same multi-accent listening training to match real global business communication contexts, so language learning directly supports on-the-job performance.
  • Keraft holds a patented AI scenario course system that delivers granular, context-rich dialogue lessons across more than 80,000 real-world scenarios, from ordering food and job interviews to travel and work presentations. From core sentence patterns to key vocabulary, the full practice system includes read-aloud, retelling, translation, sentence building, Q&A, and scenario dialogue simulation, to help learners build fast progress and speak with confidence.
  • The training flow is designed for busy working professionals with limited time: sort out core ideas in Chinese → run AI scenario dialogue → get line-by-line feedback → build a bank of natural expressions, so users can practice the exact phrases they get stuck on in meetings in just 10–15 minutes a day. The AI delivers multi-dimensional feedback after each conversation, covering fluency, professional vocabulary, grammar, logic, interactive expression, and comprehension, with suggestions for more appropriate business phrasing — for example, replacing the overly direct “You must finish” with the more polished “Could we aim to finalize…”.
  • The platform supports dynamic mid-conversation interruption, so users can jump in to correct a mistake or adjust their response mid-practice, just like a real conversation. If a user gets stuck, they can mix Chinese and English as needed, and the AI will provide multiple natural English alternatives to practice follow-along. Users can even paste draft business emails into the tool to get revised, natural office-appropriate phrasing.
  • > Drawing on conclusions from hundreds of psychology experiments on spaced repetition, Keraft’s word review system is calibrated to boost long-term memory retention, so users spend less time re-learning words they have already studied.

How to Set American English Pronunciation

  1. Open the app home screen, navigate to the vocabulary module.
  2. Tap the settings icon in the top right corner.
  3. Select American English as your preferred pronunciation to save the setting.

How to Use Dubbing Practice

  1. Open the app home screen, navigate to the dubbing studio.
  2. Select a themed material you enjoy.
  3. Watch the original video clip, then tap start recording to dub line by line.
  4. If a line receives a low score, tap the pronunciation correction tool to view phoneme-level scoring for each syllable, and re-record following the prompts.
  5. Preview your finished dubbing work, then publish and share it if you wish.

Recent Updates

  • Fixed playback issues for offline downloads on some Android devices.
  • Added a toggle for the daily phrase push notification, so users can customize whether they receive these updates.
  • Optimized AI coach speech recognition accuracy, for more stable responses even in noisy environments.
  • Adjusted word book sync mechanics to reduce duplicate reminders, integrated with evidence-based spaced repetition to improve vocabulary retention efficiency.
  • Enhanced phoneme-level correction detail prompts, with added lip and tongue position demonstrations to help users adjust their pronunciation.

Disclaimer: All product information is provided for reference only, to support informed learning tool selection.