Comparison

Script Looper vs 멈블리

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

Head to head
About

Script Looper

Master English listening comprehension with native YouTube content. This tool breaks down fast speech, offers AI-powered translations and context-aware definitions, and allows for adjustable playback speeds and looping.

Highlights
  • Loop any section of subtitles
  • Adjustable playback speed
  • AI context-aware translations
  • Drag-and-ask for word definitions
  • Sync adjustment for audio/subtitles
  • Review quizzes and study tracking
Features
Read full description

Native YouTube too fast to understand? Memorizing words and grammar won't get you there. The real answer: consistent listening to native speech you can actually understand. And the best source is YouTube - endless, authentic, and free. Script Looper makes it comprehensible. 20+ YEARS OF PROVEN METHOD, BUILT INTO ONE APP The developer knows the struggle firsthand. Even after studying in the U.S. on a government scholarship and serving at an international organization in Switzerland, fast native speech remained a wall. Starting listening practice in his mid-40s, he broke through by training only with real native audio - a method he documented in two published books on English learning (including one by a leading English-education publisher in Korea) and shared with a 50,000-member listening-study community he founded. After years of studying with existing PC browser extensions, he built Script Looper to fix everything they couldn't do: no auto-repeat, poorly segmented subtitles, no way to fix sync issues, and machine-level translations. KEY FEATURES - Loop Any Section Tap once to repeat a subtitle line until you catch every word. Drag to select part of a line - or several lines - and loop exactly what you need. - Speed Control No speech is too fast at 0.75x or 0.5x. Adjust speed even while looping. - AI Context Translation ChatGPT and Gemini generate context-aware translations in your language, displayed line by line under subtitles restructured into natural sentence units. Long videos are divided into 5-minute sections, with completed sections marked so you can pick up where you left off. - Don't Understand? Drag & Ask Words, idioms, even slang you won't find in dictionaries - drag to select anything and tap Ask. Get the meaning in context, nuance, and example sentences instantly, in your language. - Sync Adjustment If subtitles and audio don't match, fix it on the fly in 0.1s or 0.5s steps. Especially useful for auto-generated captions. - Review Quizzes & Study Tracking Everything you've asked about comes back as quizzes. Set a daily goal and track your study time by day and week. NEVER WONDER WHAT TO WATCH Sitcoms, news, talk shows, lectures, kids' content and more - open our curated channel collection (Script Looper YouTube Picks) right from the app. From Friends to TED to CNN, every channel is checked for subtitle quality. PERFECT FOR YOU IF... - Your test scores are fine, but real listening and speaking aren't - You've tried learning with shows or YouTube and gave up - You believe in acquisition through comprehensible input - not memorization When enough comprehensible native speech accumulates, one day your ears open and the words start coming out on their own. Enjoy native YouTube - and get there. Note: Script Looper is a learning tool that works on top of YouTube. Some features require a ChatGPT account (both free and paid accounts are supported). (c) 2026 Sinho Kim. Script Looper. All rights reserved.

About

멈블리

Read full description

Mumbly는 실제 인터뷰와 대화 영상으로 하는 영어 쉐도잉 앱이에요. 창업가 인터뷰, 강연, 대화에서 일상 표현이 많은 1~2분 구간을 골라 스크립트와 문장별 해석, 핵심 표현까지 다듬어 두었어요. 긴 문장은 호흡 단위(구절)로 나눠 두어서, 한 구절을 듣고 바로 따라 말할 수 있어요. ■ 보던 유튜브 영상으로도 연습 쉐도잉 탭의 +에서 유튜브 링크를 붙여넣거나, 유튜브 앱이나 Safari에서 공유를 누르고 Mumbly를 고르면 따라 하기 좋은 1~2분 구간을 골라 줘요. 고른 구간의 스크립트와 해석, 핵심 표현을 만들어 30초쯤 뒤 바로 연습할 수 있어요. 영어로 말하는 영상이어야 하고, 하루에 추가할 수 있는 횟수가 정해져 있어요. ■ 구절 단위로 듣고 따라 말하기 - 한 번 듣기, 전체 반복, 한 구절 반복, 한 구절씩 네 가지 반복 방식 - 한 구절씩은 구절이 끝나면 멈춰서 따라 말할 틈을 줘요 - 재생 속도 0.7×, 0.8×, 0.9×, 1× - 재생 중 AirPods 두 번 탭으로 다음 구절, 세 번 탭으로 이전 구절 ■ 문장마다 해석, 단어마다 뜻 영어 문장 바로 아래에 자연스러운 한국어 해석이 있어요. 해석을 끄고 영어만 볼 수도 있어요. 단어를 길게 누르면 기본형, CEFR 등급, 뜻이 보여요. ■ 연습 전에 보는 난이도 구간마다 길이, 단어 수, 말 속도(1분에 말하는 단어 수, WPM)를 보여 줘요. 처음 듣는 단어가 몇 개인지, 구절마다 말 속도가 얼마나 다른지 미리 보고 고를 수 있어요. ■ 단어장 쉐도잉하며 들은 단어와 표현이 들은 횟수와 함께 쌓여요. 단어에는 CEFR 등급을 함께 보여 줘요. 단어가 나온 문장을 누르면 그 부분만 다시 들을 수 있어요. ■ 통계 총 연습 시간, 들은 어휘의 레벨 분포, 평균 듣기 속도를 보여 줘요. Mumbly는 마이크를 쓰지 않고 목소리를 녹음하지 않아요. 연습 기록은 구절을 들은 횟수와 연습한 시간이에요. Apple 또는 Google 계정으로 시작하고, 계정은 앱 설정에서 언제든 삭제할 수 있어요. 영상은 유튜브 공식 플레이어로 재생되며, 각 영상의 권리는 원저작자에게 있어요. 문의: support@mumbly.kr

Screenshots

Script Looper4 screens
멈블리4 screens

Verdict

The call

The clearest difference is ads: 멈블리 at none against Script Looper's shown. 멈블리 also leads on update cadence (daily vs every 8 days). Script Looper's advantage is iOS requirement (16.0 vs 18.0). On price, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Script Looper ships an update every 8 days, 멈블리 daily. The most recent releases landed on October 20, 2026 and October 16, 2026 respectively.

Scorecard3 real differences · 5 level
Script Looper versus 멈블리: the parameters behind the verdict, then further details
ParameterScript Looper멈블리
PriceFreeFree
Positive reviews100.0% of reviews—
Update frequencyEvery 8 daysDaily — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPad — betteriPhone
Requires iOS16.0 — better18.0
Further details — not scored
Size9 MB7 MB
Age rating17+12+
DeveloperSinho KimSpreneur Inc.

In-app purchases

None

Script Looper

No in-app purchases

None

멈블리

No in-app purchases

Questions

Is Script Looper free?
Script Looper is free to download, with no in-app purchases.
Is 멈블리 free?
멈블리 is free to download, with no in-app purchases.
Do Script Looper or 멈블리 have ads?
Script Looper shows ads; 멈블리 does not.
Which is updated more often, Script Looper or 멈블리?
Script Looper ships an update every 8 days, and 멈블리 daily. Most recently, Script Looper was updated on October 20, 2026 and 멈블리 on October 16, 2026.

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