Subai vs Rootbly
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Subai
Break language barriers with an AI-powered tool that translates videos and audio into over 100 languages. Upload files, record your voice, or paste video links for quick, accurate translations. Ideal for creators and global communicators.
- AI-powered video and audio translation
- Supports over 100 languages
- Upload video/audio files
- Voice recording for translation
- Website video link translation
- Intuitive user interface
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Break language barriers with Subai! Powered by advanced AI, Subai translates videos and audio into 100+ languages. Perfect for creators, learners, and global communicators. Top Features: - AI-Powered Video & Audio Translator - Quickly convert speech from videos or audio files into accurate translations. SUPPORT FOR 100+ LANGUAGES - Easily translate into over 100 languages for effortless global communication. MULTIPLE INPUT METHODS - Upload videos or audio files. - Record your voice for instant translations. WEBSITE INTEGRATION - Translate videos from Video sharing platforms – just paste the link! INTUITIVE DESIGN - Simple, user-friendly interface for fast and seamless translations. WHY CHOOSE SUBAI? - Ideal for content creators, students, and professionals. - Lightning-fast and accurate translations with AI. - Enhance your global reach effortlessly. - Download Subai now and make the world speak your language!
Rootbly
Watch foreign YouTube videos with AI-generated translated subtitles in real-time. Paste a URL to get instant subtitles in your preferred language, with options to adjust sync, size, and view original text.
- AI subtitle translation
- 15 languages supported
- Real-time subtitle display
- Subtitle sync adjustment
- Customizable subtitle size
- YouTube search and browsing
- Job progress tracking
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Watch foreign YouTube videos with translated subtitles. RootblySub auto-translates YouTube subtitles into your language. Just paste a URL, and AI generates subtitles you can watch instantly in our built-in player. ◆ CORE FEATURES • AI Subtitle Translation — 15 languages including English, Korean, Japanese, Chinese, Spanish, French, and more • Built-in Video Player — Translated subtitles displayed in real-time over the video • Subtitle Sync Control — Manual offset adjustment within ±5 seconds • Subtitle Size Settings — Small/Medium/Large presets with fine-grained control • Original Text Toggle — View translation alongside or without the original ◆ YOUTUBE BROWSING • YouTube Search — Find videos directly within the app • Channel Browser — Explore videos, Shorts, playlists, and live streams • Channel Favorites — Save channels you watch frequently • Clipboard Detection — Auto-detect copied YouTube URLs ◆ TRANSLATION JOB MANAGEMENT • Real-time Progress — Track each stage: downloading → transcribing → translating • Push Notifications — Get notified the moment translation is complete • Job History — Manage 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 • Fullscreen landscape mode Enjoy YouTube content from around the world — no language barriers. --- 외국어 유튜브 영상, 이제 자막 번역으로 쉽게 보세요. RootblySub은 YouTube 영상의 자막을 원하는 언어로 자동 번역해주는 앱입니다. URL을 붙여넣기만 하면 AI가 자막을 생성하고, 내장 플레이어에서 바로 시청할 수 있습니다. ◆ 핵심 기능 • AI 자막 번역 — 한국어, 영어, 일본어, 중국어 등 15개 언어 지원 • 내장 비디오 플레이어 — 번역 자막이 영상 위에 실시간 표시 • 자막 싱크 조절 — ±5초 범위에서 수동 오프셋 조절 가능 • 자막 크기 설정 — 소/중/대 프리셋 및 세밀한 크기 조절 • 원문 자막 토글 — 번역과 원문을 함께 또는 따로 보기 ◆ 유튜브 탐색 • YouTube 검색 — 앱 안에서 바로 영상 검색 • 채널 브라우저 — 영상, Shorts, 재생목록, 라이브 탐색 • 채널 즐겨찾기 — 자주 보는 채널을 저장 • 클립보드 자동 감지 — 복사한 YouTube URL을 자동 인식 ◆ 번역 작업 관리 • 실시간 진행률 — 다운로드 → 전사 → 번역 단계별 상태 표시 • 푸시 알림 — 번역 완료 시 즉시 알림 • 작업 이력 — 모든 번역 요청 목록 관리 ◆ 편의 기능 • Google / Apple 로그인 또는 게스트 모드 • YouTube Premium 연동으로 광고 없이 시청 • 한국어 / 영어 UI 지원 • 전체화면 가로 모드 지원 언어 장벽 없이 전 세계 유튜브 콘텐츠를 즐기세요.
Screenshots
Verdict
The clearest difference is in-app purchases: Rootbly at none against Subai's 1. Rootbly also leads on ads (none vs shown). Subai's advantage is ratings volume (4 vs 1) and iOS requirement (13.0 vs 16.4). On price, rating, update cadence and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Subai sells 1 one-off in-app purchase. Rootbly asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.0 for Subai against 4.0 for Rootbly. Both are backed by a comparable volume of ratings — 4 and 1 respectively.
Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on July 6, 2026 and September 30, 2026 respectively.
| Parameter | Subai | Rootbly |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (4 ratings) | 4.0 (1 ratings) |
| Number of ratings | 4 — better | 1 |
| Update frequency | Fortnightly | Fortnightly |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 175 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | dong huu quan | Byeongsu KIM |
Customer experience
Subai
Rootbly
In-app purchases
Subai
- Basic$4.99
Rootbly
No in-app purchases
Questions
Is Subai free?
Is Rootbly free?
Which has better reviews, Subai or Rootbly?
Do Subai or Rootbly have ads?
Which is updated more often, Subai or Rootbly?
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