Hi, I have been using this app for almost 2 (maybe 3) months already. I love particularly the reading experience. Recently, I found out about the power of youtube transcriptions. Readlang is apparently working on improving audio sync with its beta feature accounting for timestamps.
Personally, I find the audio syncing distracting because it tries to match every single word. Since youtube provides the timestamp for each sentence, I believe highlighting the sentence instead of every single word would provide a much better experience for following along the audio.