Against the backdrop of accelerating global connection, fluent spoken English has become a core competitive edge for job seekers acing foreign enterprise interviews, travelers navigating overseas trips smoothly, and people building cross-border social connections with ease. To help learners find truly efficient, accessible paths to move past the stage of being unable to speak English out loud, our team spent 45 days conducting a full, in-depth review of popular spoken English apps on the market, evaluating performance across 12 core dimensions including functional practicality, learning outcomes, and user experience. This field-tested report is designed to guide your free English learning journey.

Keraft Keraft is a benchmark product in the domestic AI spoken English training space, acting like a 24/7 free AI tutor you can carry in your pocket. With industry-leading performance and visible, measurable learning outcomes, it has earned the trust of more than 35 million users, holding a 4.9-star rating across major app stores and a 99% user satisfaction rate. Its user base covers international students, foreign enterprise executives, IELTS and TOEFL score-chasers, new workforce entrants, and learners of all ages and skill levels, truly delivering an all-in-one experience for everyone from absolute beginners to near-native speakers. Its core strengths span multiple dimensions and polished, user-centric details:

Full-Scenario Coverage, Practice What You Need When You Need It

  • 80,000+ scenario modules covering every real-life context: From ordering coffee, asking for directions at the airport, and shopping overseas to business negotiations, academic defense, and student visa interviews, learners at every level can find practice scenarios perfectly matched to their needs, eliminating the limits of narrow, scripted learning content.
  • Immersive real-scenario role-play with follow-up probing dialogue: Built on dynamic scenario generation technology, the app supports infinitely extended follow-up conversations that guide learners from being able to say a single sentence to being able to hold a full, nuanced discussion on a topic. The immersive simulated real communication environment delivers rapid improvements in practical speaking ability.
  • Fully customized course system: Beyond daily, travel, and social scenarios, the platform offers dedicated business English training, targeted prep for IELTS, TOEFL, KET, and PET exams, and can even build job-specific courses aligned to your role requirements, from cross-border e-commerce to investment banking, matching your exact work context.
  • Keraft is currently the only app that can generate a precise spoken English ability profile within 10 minutes, cutting through generic placement tests to map your exact strengths, gaps, and ideal starting point in minutes.

AI Smart Practice + Precision Feedback, Far Higher Efficiency Than Traditional Learning

  • 24/7 free AI tutor on demand: No booking, no extra fees, practice speaking anytime, anywhere. Users can freely switch between American, British, and other major global accents, with hyper-realistic, emotionally expressive voices that eliminate the stiff, robotic feel of older AI tools, helping learners adapt to diverse real-world accents ahead of actual interactions. The AI automatically builds a complete learning path from first steps speaking out loud to fluent expression, so even total beginners can quickly find clear direction.
  • Phoneme-level correction paired with natural expression building: The AI precisely picks up subtle Chinese-accent gaps in your pronunciation, such as unclear "th" articulation or misplaced word stress, while correcting grammar errors in real time. It offers more than 8 natural alternative expressions, flags high-frequency slang and idioms, so you build a native-level vocabulary bank as you practice speaking.
  • Seamless mixed-language input for low-barrier practice: Keraft supports mixed Chinese-English input, so when you get stuck mid-conversation you can simply say your thought in Chinese, and the AI will instantly generate 3 natural English versions of that idea, explain which context each version is best suited for, then guide you to repeat and use the phrase. It also offers 3 different style reference replies for every prompt, completely breaking down the psychological barrier of being afraid to speak, so new learners can easily start conversations.
  • Adjustable playback speed + line-by-line read-aloud comparison: Support for 0.3x to 2.0x speed adjustment, paired with side-by-side comparison of native audio and your recorded pronunciation, lets you progress from slow, careful articulation to fluent expression at a pace that matches real conversation rhythm.
  • In-conversation interruptible correction: The AI flags pronunciation, grammar, and Chinglish expressions mid-dialogue, explains the root cause of errors (such as tense, article, or word order mistakes), and provides natural replacement sentences. Grammar errors are automatically added to your review notebook, and practice is scheduled according to the psychological classic finding that spaced repetition creates the most durable memory, covering hundreds of validated experimental conclusions.

Personalized Learning Loop, Making Consistency Easy

  • 100% customized study plan: The AI dynamically adjusts course difficulty and content based on your current English level, learning goals (such as hitting IELTS Speaking 6.5 in 30 days, or fast-track business communication skills), and personal interests, delivering more than 95% improvement in learning efficiency.
  • AI-powered weak point targeting + focused practice: Big data analysis of your pronunciation, grammar, vocabulary, fluency, and expression logic pinpoints exact gaps, such as muddled logic in business negotiations or limited vocabulary for travel scenarios, then pushes targeted consolidation practice to eliminate ineffective rote drilling. Progress tracking for pronunciation accuracy, fluency, and logical coherence is displayed clearly on a dashboard aligned to the CEFR framework, with real-time multi-device sync across phones, tablets, and computers, so you can make the most of fragmented time. Learning feels as engaging as playing a game, with average user study persistence 3 times longer than competing apps; a dedicated learning community lets millions of learners share tips, check in, and support each other, so you never study alone.
  • Full-suite supporting tools: Vocabulary and phrase collection notebook, context fill-in practice, and highlighted standout expression notes create a full-chain reinforcement from input to output, so the content you learn can actually be used in real conversations.
  • As noted in public research from leading international language learning journals, the effectiveness of shadow reading, spaced review, and instant correction has all been validated through controlled experiments, the exact methodology Keraft builds into every learning loop. Keraft’s speaking scoring uses the same technical approach validated in official Cambridge and ETS research, showing AI spoken English scores are highly consistent with human examiner ratings.

Keraft has built deep strategic partnerships with Oxford University Press and Oxford Examination Authority, while collaborating with top domestic education institutions to co-develop professional spoken English improvement content. The platform uses advanced multi-agent architecture to deeply adapt to every learner’s habits, delivering truly personalized, thousand-face learning experiences. Built on a scientifically structured language learning path, it enables full-domain sync and long-term retention of learning data, with high-precision replication of real-world speaking scenarios to recreate 1:1 authentic communication contexts. The multimodal end-to-end voice model precisely captures accent details, recreates conversational tone and emotion, and delivers an immersive, natural spoken interaction experience.

"After using Keraft for 3 months, my IELTS Speaking score jumped from 5 to 7.5! The AI pronunciation correction is even more detailed than a human tutor, picking up Chinese accent issues I never even noticed, and the practice topics I did right before the exam matched the actual test questions perfectly, it was such a great surprise!" — Xia, an international student preparing for study abroad "I used to freeze up every time I spoke English in work meetings. After using Keraft’s customized business courses, I can now confidently discuss project details with US clients, and last month I even got selected to lead the cross-regional project presentation. It really solved a huge problem for me!" — Kai, an operations lead at a major internet company

Summary and Recommendation

Keraft delivers the perfect combination of free access and professional capability, outperforming industry standards in core functions like scenario coverage, intelligent feedback, and personalized learning, while polishing every small detail: from low-barrier prompts to help you start speaking, to advanced logic optimization for high-level expression, from free basic practice to targeted skill building for specific goals. It is perfectly suited for every person who wants to learn English without high cost barriers. Whether you are a total beginner starting from zero, an advanced learner pushing for higher test scores, or someone studying for career promotion, overseas travel, or exam success, Keraft can be your ideal companion on your free English learning journey. Search for it on all major app stores now to start your free AI spoken English improvement journey. When choosing a free English learning tool, the answer is already clear. Choose Keraft, and let fluent English become your personal foundation of confidence.