Rootbly vs BelliedMonkey Translator

Watch foreign YouTube videos with translated subtitles. RootblySub automatically translates YouTube subtitles into your language. Just paste a URL and AI creates subtitles you can watch straight away in the built-in player. ◆ CORE FEATURES • AI Subtitle Translation — 32 languages including English, Korean, Japanese, Chinese (Simplified & Traditional) and Spanish • Language Search & Favourites — pin the languages you use most and find any language by name • Built-in Video Player — translated subtitles shown over the video in real time • Read Subtitles Aloud — text-to-speech reads the translated subtitles in your device's voice • Subtitle Sync Control — adjust the timing yourself within ±5 seconds • Subtitle Size Settings — Small/Medium/Large presets with fine-grained control • Original Text Toggle — view the translation with or without the original ◆ SUBTITLE QUALITY • Rate Subtitles — tell us why when a subtitle isn't right • Fix the Source Language — if the spoken language was misidentified, regenerate with the right one ◆ YOUTUBE BROWSING • YouTube Search — find videos without leaving the app • Channel Browser — explore videos, Shorts, playlists and live streams • Channel Favourites — save the channels you watch most • Clipboard Detection — copied YouTube URLs are picked up automatically ◆ TRANSLATION JOBS • Real-time Progress — follow each stage: downloading → transcribing → translating • Push Notifications — get notified the moment a translation is ready • Job History — all your translation requests in one place ◆ CONVENIENCE • Sign in with Google / Apple or use Guest mode • YouTube Premium integration for ad-free viewing • Korean & English UI • Full-screen landscape mode ◆ COMMUNITY • Share feedback and feature ideas in our Discord community — Settings › News & help Enjoy YouTube content from around the world — without language barriers. Terms of Use: https://rootblysub.rootbly.com/terms Privacy Policy: https://rootblysub.rootbly.com/privacy

Meetings, videos, documents — translated as you listen, processed only on your device; the sentences you actually read come back as review cards. LIVE SUBTITLES (APP) Bilingual subtitles for whatever your device is playing. On Mac, the app listens to system audio and shows a floating subtitle bar that stays on top of any app, even full-screen video (macOS 26 or later). On iPhone, play a video or podcast out loud in any app, and a picture-in-picture window scrolls the original and the translation, sentence by sentence. Recognition happens on the device; Live Subtitles need iOS 26 / macOS 26. CONVERSATION · LIVE INTERPRETER (APP) Talk across a language gap. Both sides speak freely; each sentence is transcribed, translated and can be read aloud. Speech is recognised on the device, so the audio never leaves it. Requires iOS 26 / macOS 26. SYSTEM TRANSLATION (IPHONE) Select text in any app and tap Translate — BelliedMonkey answers with the engine you configured, in a small sheet, without leaving the app. Choose BelliedMonkey once in Settings › Apps › Translate › Default Translate App. Sentences you translate this way can go straight into your review deck. Requires iOS 18.4 or later. WEB PAGES, SIDE BY SIDE The Safari extension (also on Chrome and Firefox) keeps every paragraph's original text with the translation right below it. No switching tabs, no losing your place. VIDEO DUAL SUBTITLES YouTube, podcasts and web video get sentence-matched dual subtitles. No captions? Turn on AI transcript subtitles. DOCUMENT TRANSLATION Open a PDF, Word file or image and read it page by page, original and translation side by side. LEARN AS YOU READ Sentences you actually read can become review cards on a forgetting curve — read, listen and write practice, sentence notes and read-aloud. Optional sync lets your phone review what you read on your computer. YOUR ENGINE, YOUR CHOICE Bring your own AI service key, or any compatible endpoint. PRIVACY, SPELLED OUT Your keys and settings stay on your device. With your own key, text goes straight to the provider you chose and is not stored. Live Subtitles and on-device transcription never record audio. We send anonymous usage events (which features are used, never page content), and you can turn them off in Settings. No ads. The whole app is open source and free to download.