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. The app supports 15 languages and offers a built-in player with subtitle sync and size controls. Easily find and manage videos directly within the application.
- AI subtitle translation
- Built-in video player
- Subtitle sync control
- Subtitle size settings
- YouTube search and browsing
- Clipboard URL detection
- Real-time job progress tracking
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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
Screenshots
Verdict
The clearest difference is rating: Subai at 4.2 against Rootbly's 2.5. Subai also leads on iOS requirement (13.0 vs 16.4). Rootbly's advantage is ads (none vs shown). On price, ratings volume, update cadence and in-app purchases 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 and Rootbly sells 1 in-app purchase, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.
Subai holds the better App Store score, 4.2 against 2.5. Both are backed by a comparable volume of ratings — 5 and 2 respectively.
Subai ships an update fortnightly, Rootbly weekly. The most recent releases landed on November 4, 2026 and November 13, 2026 respectively.
| Parameter | Subai | Rootbly |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (5 ratings) — better | 2.5 (2 ratings) |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 5 — better | 2 |
| Update frequency | Fortnightly | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 175 MB | 50 MB |
| Age rating | 4+ | 4+ |
| Developer | dong huu quan | Byeongsu KIM |
Customer experience
Subai
Rootbly
In-app purchases
Subai
- Basic$4.99
Rootbly
- RootblySub Pro1 Month trial$5.991 Month
