Comprehension
The sentence you didn’t catch
Wakatta has a button for the moment you get lost. One tap keeps the sentence you just heard, with its clip and a short explanation, without stopping your walk — and later it comes back with the part you missed blanked out, for you to fill in by listening.
Tap the first and last word of the chunk you didn’t get — or leave it unmarked to review the whole sentence.
It comes back with its clip and a short explanation — and the part you marked becomes the blank you fill in.
Tap the first and last word of the part you missed — that span becomes the blank in the review. Pick a reason, then add it.
Everyone learning by ear has the same experience: a sentence goes past, you half-catch it, and by the time you have decided whether to rewind, the speaker is two thoughts further on.
Stopping is the problem
Listening practice usually happens while your hands are busy. So when a sentence goes past you, the honest options are to let it go, or to stop the walk, pull the phone out and scrub backwards. Most people let it go, and the thing they did not understand is gone with it.
One tap on I got lost keeps that sentence without stopping anything. It is on the player, and it is on the lock screen and the Dynamic Island too — where it is the only button there is, so you can mark a line with the phone still in your pocket.
What it keeps
Not ten seconds of audio. The sentence you just heard, as a line of transcript, with its clip. And afterwards you can say which part of it you missed — tap the first and last word of the chunk, and that span is what the review will blank out.
You can also label why it was hard: Grammar, Keigo, Idiom, Vocabulary, Culture or Speed. That takes a second and it turns a pile of confusing sentences into a picture of what is actually blocking you. Six weeks of Moments tagged Keigo is a different problem from six weeks tagged Speed.
How it comes back
Moments live in Learn, next to your saved words — vocabulary is what you chose to keep, Moments are what tripped you. Each one carries a short explanation, written when you saved it, so opening it is not homework.
And reviewing one is not reading. The sentence comes back with the part you marked replaced by a blank, and the instruction is to listen to the clip and fill it in. You are being asked to hear it, which is the thing you could not do the first time.
Full guide: how saved words keep their audio too
Why marking beats re-listening
Re-listening to a whole episode to find the bit that defeated you costs twenty minutes and usually fails, because the sentence is only confusing in passing — on the second run you often skate over it without noticing. Marking it at the moment of failure is the only reliable way to catch it, and it is the moment you are least able to stop.