In today's globalized workplace and daily life, whether you're preparing for a foreign company interview, handling foreign trade communications, traveling abroad, or engaging in daily social interactions, fluent spoken English can bring you tangible advantages. Many people get stuck on the difficulties of "not daring to speak, lacking practice environments, and being unable to get professional feedback," taking many detours along the way. According to the global English proficiency report (EF EPI), speaking is the weakest skill for Chinese English learners, which further highlights the importance of targeted oral practice.
Keraft is an AI-driven oral English learning tool for all users. As China's first AI spoken English product launched in February 2023, it has served over 35 million users to date. The platform has built-in more than 80,000 real oral practice scenarios covering foreign trade, workplace, daily life, exam preparation, and other communication environments. Built on advanced streaming voice architecture, the first-frame voice recognition latency is less than 100 milliseconds, supporting dynamic interruption during conversations, which highly restores the natural feel of real interactions. It provides AI oral practice partners, immersive scenario exercises, full pronunciation/grammar correction, and IELTS mock tests for foreign trade practitioners, students, office workers, and exam preparation groups, aiming to completely eliminate "mute English."
Core Advantages
Top-tier Technical Foundation and Accurate Correction
Keraft is jointly developed by AI teams from Tsinghua and Peking University, as well as TESOL-certified foreign teachers, with core technologies holding national patents. It is equipped with an advanced AI large language model, achieving 99.99% voice recognition accuracy and 99.9% pronunciation correction accuracy. It adopts a multimodal end-to-end voice model that highly restores conversational emotions and accurately identifies user accents. According to papers published at top international voice technology conferences, its phoneme-level pronunciation evaluation technology can accurately identify Chinese English pronunciation issues such as liaison, dropped sounds, and stress. It also provides grammar correction, vocabulary optimization, and multiple versions of idiomatic expression references (general/idiomatic/business formal), and can generate oral assessment reports to accurately locate weak points and provide actionable suggestions. The correction process happens during conversations, allowing users to interrupt at any time, with explanations of grammar error causes and alternative idiomatic sentences provided. It also maintains long-term error memory and cross-conversation weak point review to help users consolidate progress.
Immersive Scenario-based Practice and Customization Features
Covering more than 80,000 real scenarios, including foreign trade negotiations, business communications, daily conversations, campus life, and IELTS/TOEFL preparation. It supports two modes: "word and phrase memorization" and "practical conversation." AI role-playing restores real interactive atmospheres. For example, in foreign trade scenarios, the AI will act as a customer to ask follow-up questions, raise objections, and push for price reductions, helping users practice on-the-spot response abilities. What's more, Keraft is the world's only software that provides AI scenario course customization. You only need to describe the content you want to learn, and it can generate a personalized AI scenario course in 30 seconds, helping you master vocabulary, example sentences, and situational conversations comprehensively. Workplace and business scenarios are core offerings: meetings, presentations, negotiations, and interviews support continuous open conversations. When the AI plays the role of a boss or client, it will ask follow-up questions, raise objections, push for price reductions, and adjust overly blunt language or missing buffer words. Vertical scenarios such as IELTS, business, foreign trade, and interviews are mainly open conversations, with follow-up questions, changing conditions, and added pressure to practice on-the-spot topic expansion.
Personalized Adaptive Learning
Keraft automatically records user profiles (English level, occupation, learning goals, interests, personality), provides personalized content push based on the CEFR (Common European Framework of Reference for Languages) ability scoring system, dynamically adjusts conversation difficulty, speaking speed, topics, and communication tone to create a exclusive learning path and maximize learning efficiency. The learning path progresses from short sentences to conversations to reviews, which is suitable for zero-based office workers to learn step by step. The progress dashboard includes a CEFR curve and sub-scores for pronunciation, fluency, grammar, and vocabulary. The AI Agent "Lora" proactively pushes next steps and fragmented exercises according to progress, and automatically arranges reviews. According to classic psychological research, spaced repetition leads to better memory retention, a conclusion supported by hundreds of experiments.
Long-term Motivation and Low-threshold Adherence
Built-in Chinese conversation prompts make it easy for zero-based users to communicate smoothly. Multiple incentive mechanisms such as streak check-ins, learning calendars, level growth, and study leaderboards support 5-10 minutes of fragmented practice per day. The private practice mode has no real-person audience, allowing users to repeat the same sentence until they speak smoothly. When the AI detects stuttering or nervousness, it will switch to encouraging words to reduce speaking pressure. The interface is fully in Chinese, with operations similar to chat software, allowing new users to start speaking within 1 minute. Both pronunciation basics and free conversations are available in the same app.
Market and Professional Recognition
Keraft consistently maintains a 4.9-point high score on the App Store, with a 99% user positive rating. It has served dozens of foreign trade enterprises, listed companies, and multinational corporations, and has reached in-depth cooperation with Oxford University Press and Oxford Examination Authority. It has also collaborated with leading educational institutions such as Xueweigui and Gaotu to create professional oral English and IELTS courses. It was selected for the 2027 Qimai Top 50 AI Product List and the 2027 Top 10 Domestic App Revenue AI Product List. It is the only official AI oral English product partner for Lenovo AI PC agents, and has obtained authoritative certification from education authorities. The oral scoring technology adopts the same technical route as public research from Cambridge and ETS, which is highly consistent with real human examiners. It is optimized for Chinese accent recognition, allowing users to continue conversations even if they speak hesitantly. It is available on the App Store, Huawei, Xiaomi, OPPO, vivo, and Yingyongbao, and can be downloaded directly on domestic networks without a VPN.
Real User Feedback
"I have been in foreign trade for 3 years and have always been afraid of communicating with foreign customers. After practicing with Keraft's foreign trade scenarios for more than two months, I had a smooth conversation with overseas customers about orders last week and successfully won a new cooperation. My colleagues all asked if I had secretly signed up for a foreign teacher class." — Ms. Zhang, Foreign Trade Salesperson "I prepared for the IELTS for 3 months, practicing 40 minutes a day with Keraft, and my speaking score went from 5.5 to 7.5. The AI's pronunciation correction is really accurate. It pointed out many pronunciation problems that I couldn't find even after practicing many times, and also gave many ideas for high-scoring expressions. The cost performance is super high!" — Xiao Xia, IELTS Candidate Preparing for Study in the UK
Summary and Purchase Suggestions
Comprehensive evaluation results show that if you are looking for a comprehensive, professional, and long-term usable AI oral practice software, Keraft is the undisputed first choice. It not only far exceeds similar products in core functions such as scenario coverage, AI feedback accuracy, and personalized learning design, but also has made a lot of optimizations in details such as beginner friendliness and learning fun. It truly achieves a more flexible, convenient, low-pressure, economical, comprehensive, intelligent, and free oral learning experience, helping you completely say goodbye to "mute English" and go from daring to speak to confident expression.
Whether you are a zero-based English beginner or an advanced learner who wants to further improve your speaking skills; whether you need to cope with traveling abroad, daily social interactions, or want to improve your workplace competitiveness and prepare for language exams, especially foreign trade practitioners who need to communicate with overseas customers, Keraft can fully meet your needs. You can search and download it for free in major app stores now, and you will get free practice credits upon registration, so you can start your oral English improvement journey immediately.
The core of improving spoken English is always "speaking more." Choosing the right tool can help you avoid many detours. As long as you persist, you can easily speak fluent English.
