Listen to 1–2 minute clips picked from YouTube interviews and conversations, one phrase at a time, and say each phrase back. Key expressions and words come with simple English notes, and the words you hear collect in your word list.
We pick 1–2 minute clips from real interviews and conversations and prepare a script, key expressions, and word meanings for each one. Choose by length, word count, and speaking speed.
Long sentences are split into breath-sized phrases. Listen to one phrase and say it right back. Once it feels easy, turn up the speed.
Mumbly keeps track of your practice time, the levels of the words you've heard, and your average listening speed. Tap a day on a chart to see that day's numbers.
Play Once, Repeat All, Repeat Phrase, and Phrase by Phrase. Phrase by Phrase pauses after each phrase so you have time to say it.
Key expressions and words get short, easy-to-follow explanations in plain English.
Honestly, I had no idea what I was doing.
have no idea: to not know at all
Each word you hear is saved with its CEFR level, a plain-English meaning, how many times you've heard it, and the sentences it appeared in.
Double-tap for the next phrase, triple-tap for the previous one. Keep shadowing without looking at your phone.
Choose 0.7×, 0.8×, 0.9×, or 1×. The Stats tab shows the speaking speed you practiced at, day by day.
Tap Share in the YouTube app and choose Mumbly. It picks a good clip for shadowing from that video and writes the script and notes for it.
Every clip shows how fast the native speakers talk, in words per minute (WPM). Start at a speed that feels comfortable and work your way up.
Clear, careful explanations
Calm interviews
Casual back-and-forth
Rapid back-and-forth
When you add a video, Mumbly recommends the clip closest to the speed you've been practicing at.
Mostly interviews and conversations in American English. We focus on real back-and-forth talk rather than lectures, and pick 1–2 minute clips full of everyday expressions. Each clip comes ready with a script, key expressions, and word meanings.
No. Mumbly doesn't use the microphone. It only keeps track of how many times you listened to each phrase and how long you practiced.
You can slow clips down to 0.7×, and key expressions and words are explained in plain English, so you can start even if videos are hard to follow without captions. At first, just pick the slower clips.
Yes. Tap Share in the YouTube app and choose Mumbly, and it recommends a good clip for shadowing from that video. The video needs to be in English and have English captions, and there's a daily limit on how many you can add.
It works on iPhone with iOS 18 or later and on Android phones with Android 9 or later.
Sign in with Apple or Google and you're ready to go. You don't need to create a password. You can delete your account anytime in the app's Settings.
