Nebula (Android phone + TV) v1.86.0

Pick the line you just heard to move add-on subtitles into time. Open the subtitle panel, tap Pick the line you just heard, and choose the line that was just spoken. The video pauses while you choose, then you can fine-tune with the timing buttons. (1.85.3: reading failures retry up to three times, and a failure in the last minute counts as watched.)