When accepting the trial period I agreed (flagged) to be informed before it finishes. Not a single notification arrived, just after the midnight the amount for 3 month was taken from the card. As for the app content, not that bad, but it has a lot (and I mean really A LOT) of bugs, it gets stuck with no reason, while reading the text it invents words that never appear in the subtitles, very often it understands a completely different thing when I reply to the tutor. Ok for these three month, however not sure to be willing to renew after.