# Keyu: Live Lecture Captions — Live-translated class captions > Live on-device lecture captions and translations for students and attendees. (iPhone/iPad app by JIACHENG GUO.) - Source: https://appshunter.io/ios/app/keyu-live-lecture-captions/id6809385865 (this page in markdown: same URL + `.md`) - Developer: [JIACHENG GUO](https://appshunter.io/developer/6809385867) - Category: Education, Utilities - Price: Free - Rating: 5.00/5 from 2 App Store ratings - Age rating: 4+ - Requires: iOS 26.0 · 10 MB - Languages: American English, French (France), German (Germany), Indonesian, Italian, Japanese, Korean, Brazilian Portuguese, Russian, Chinese (Simplified, China) and 4 more - Released: 2026-09-25 - Data updated: 2026-10-04 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/keyu-live-lecture-captions/id6809385865/reviews.md ## What is Keyu? Keyu turns a lecture into live captions: what the teacher says appears on screen within seconds, each line followed by a translation. Recognition and translation run on the device through Apple's system frameworks, with no network round trip. Audience - Students in foreign-language lectures who need captions and translation - Attendees of international talks, seminars, and open courses - Anyone who wants bilingual notes of a class Workflow On first launch, a guided setup lets you choose languages, grant Microphone and Speech Recognition permissions, and download Apple's system recognition and translation components — the only step that requires a connection. After that, the app works offline. Tap the microphone button at the top right when class begins, and tap Stop when it ends. The session is saved automatically. Languages Recognition: English, Chinese (Mandarin and Cantonese), Japanese, Korean, Spanish, French, German, Italian, Portuguese. Translation: about 20 languages, following the device language by default. When both languages are the same, only the original captions are shown. Available languages depend on iOS. The interface is available in 14 languages. iPad Native support for full screen, Split View, Slide Over, and Stage Manager, with text size and layout adapted for the larger display. External keyboard shortcuts: ⌘R to start, ⌘P to pause or resume, ⌘. to stop. Display and after class Three text sizes; captions can show original and translation, original only, or translation only. Recording continues when you switch apps or lock the screen; the Lock Screen and Dynamic Island show elapsed time and the latest line, and you can pause and resume. Each class is saved automatically as a session you can search and review in bilingual full text. Long-press a line to copy or share it, or copy the full text. Export as TXT, SRT with timestamps, Markdown, or PDF. The audio recording stays on the device; it can be played in the app or exported as m4a. Privacy Recognition, translation, and recording all run on the device; core features rely on no server, and class content is not uploaded. The only network component is an optional, user-initiated diagnostic log upload, disclosed in the privacy policy. Caption text is included only in your encrypted iCloud system backup, if enabled. Limitations - Noise, distance, or strong accents may cause recognition errors; an orange status dot means sound is detected but temporarily not recognized - Requires iOS 26 or iPadOS 26 or later Support: keyu@gacing.com ## Key features - Live captioning of lectures - On-device translation - Offline functionality - Automatic session saving - Multiple export formats (TXT, SRT, PDF) - Adjustable text sizes - Background recording ## Frequently asked questions about Keyu ### What languages does Keyu support for recognition and translation? Keyu supports recognition in English, Chinese, Japanese, Korean, Spanish, French, German, Italian, and Portuguese. Translation is available in approximately 20 languages, typically following your device's language. The app interface itself is available in 14 languages. ### Does Keyu work offline? Yes, after an initial guided setup to download necessary system components and grant permissions, Keyu works entirely offline. This means you can use it for lectures without an internet connection. ### How are lecture sessions saved and what can I do with them? Each class session is automatically saved within the app. You can search and review the full bilingual text of your lectures. Individual lines can be copied or shared, and the entire session can be exported in formats like TXT, SRT, Markdown, or PDF. ### What are the system requirements for Keyu? Keyu requires iOS 16 or iPadOS 16 or later. It is designed to work on both iPhone and iPad devices, with native support for iPad features like Split View and Stage Manager. ### Can Keyu handle noisy environments or strong accents? While Keyu strives for accuracy, external factors like noise, distance from the speaker, or strong accents may cause recognition errors. An orange status dot indicates that sound is detected but temporarily not recognized. ### How does Keyu protect user privacy? Keyu is designed with privacy in mind, with recognition, translation, and recording all happening on the device. Core features do not require a server connection, and class content is not uploaded. The only network component is an optional diagnostic log upload. ### What is the user sentiment for Keyu? Based on the available data, Keyu has received a perfect 5.0-star rating from 2 user reviews, indicating a very positive initial reception. ### How often is Keyu updated? The latest version, 1.1, was released on September 27, 2026, indicating recent development activity. The app was initially released on September 25, 2026. ## Version history (last 2 releases) ### 1.1 — 2026-09-27 - iPad: native full screen, Split View, Slide Over, and Stage Manager support; text size and layout adapted for larger displays; external keyboard shortcuts — ⌘R start, ⌘P pause or resume, ⌘. stop - Languages: the interface is now available in 14 languages; languages can be chosen during first-launch setup; the default translation language follows the device language - Display: three text sizes; switch between original and translation, original only, or translation only - Copy and share: long-press a line to copy or share it, or copy the full text; PDF export added, alongside TXT, SRT, and Markdown; recordings export as m4a - More: translation color is clearer and easier to read; captions return to the latest line after changing text size or display mode; exported files are named after the class; unsupported older devices get a clear notice; stability fixes ### 1.0 — 2026-09-26 No release notes. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-04.*