These are independent learning products by the same creator, Yi Builds. Choose a tool for the next action you want to practise: understand a source, explain an idea, revise a draft or try a new situation.
ReadTrace is an English reading practice tool: connect an answer to evidence in the passage, review a misreading, and try a new question.
The authored sample is available without an account. Photo import supports text recognition, correction and saving when configured; automatic teaching for arbitrary photos is not yet available.
EssayStep is an English essay writing coach for multilingual learners: plan your ideas, write your own draft, and revise with evidence-linked feedback.
Planning and writing work without login. AI feedback requires login and configured services. Feedback is formative, not an official IELTS, TOEFL or GRE score.
Own Words is a workplace English practice prototype: start with something you could not say, try a response, remove hints, and check it in a different situation.
The web demo supports typed practice and fictional example records. Live AI assessment and speech recognition are not connected. The Android app is in development.
Video Sensei is a video learning workspace that turns supported YouTube transcripts into time-aligned bilingual reading, contextual explanations, saved notes and practice.
Import and AI tools require an account and available provider services. Transcript availability varies by video. A translated explanation should be checked against the original segment.
AI English Shift combines AI concepts with English practice through authored readings, bilingual support, knowledge connections, dictation and transfer writing.
Learning materials can be explored without login. The contextual AI tutor requires a configured account. Support varies by lesson; an introductory page does not imply every course is available in that language.
Fusen is an everyday English note app currently being updated. It belongs to the same creator’s learning projects. A public store listing and download link are not offered on this page.
Read a passage in ReadTrace or work through a video in Video Sensei. Write your own explanation, then revise it in EssayStep. Practise a short workplace response with Own Words, or explore an AI concept in AI English Shift. Each product has its own account, availability and learning records; linking them does not transfer your data.
The exercises focus on showing your reasoning, checking against a source, and trying again with less help. Product examples and demo records are not evidence of measured learning gains. Visit the creator’s website for the wider body of work.