Comparison

Rootbly vs CodecPlayer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • AI subtitle translation
  • 15 languages supported
  • Real-time subtitle display
  • Subtitle sync adjustment
  • Customizable subtitle size
  • YouTube search and browsing
  • Job progress tracking
Features
Read full description

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.

About

CodecPlayer

Features
Read full description

CodecPlayer is a focused local video player for iPhone and iPad. Open videos from Files or Photos and keep them organized in a persistent playlist. PLAY MORE FORMATS Use native playback for iOS formats and VLC-powered playback for formats such as MKV, AVI, FLV, and WebM. BUILT FOR LONG WATCHING CodecPlayer remembers your position, highlights your most recently played video, and continues through the playlist in order. Reorder videos any time with drag and drop. COMFORTABLE CONTROLS Double-tap to seek, swipe horizontally to scrub, adjust brightness on the left and system volume on the right, or press and hold for temporary 2× playback. Switch between fit and fill, use embedded subtitles, and play in full screen or Picture in Picture. LOCAL-FIRST Your videos stay on your device. Files are referenced in place whenever possible, without creating unnecessary duplicate copies. CodecPlayer does not require an account.

Screenshots

Rootbly4 screens
CodecPlayer4 screens

Verdict

The call

Rootbly and CodecPlayer are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ScorecardNo meaningful differences
Rootbly versus CodecPlayer: the parameters behind the verdict, then further details
ParameterRootblyCodecPlayer
PriceFreeFree
Rating4.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyFortnightly—
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.416.0 — better
Further details — not scored
Size41 MB37 MB
Age rating4+4+
DeveloperByeongsu KIMHao Xiong

In-app purchases

None

Rootbly

No in-app purchases

None

CodecPlayer

No in-app purchases

Questions

Is Rootbly free?
Rootbly is free to download, with no in-app purchases.
Is CodecPlayer free?
CodecPlayer is free to download, with no in-app purchases.
Do Rootbly or CodecPlayer have ads?
Neither Rootbly nor CodecPlayer shows ads.

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