There are learning principles that I agree with, but lately, they've been stepping up their upselling game and they actually "cheat" to force you to buy their crap. Correct answers will not be accepted, then you'll run out of hearts, run out of time, and you break your streak, and you feel bad about it. Any you know, whoever you are behind Duo Lingo, this has been at least my 5th time giving you a second chance and now I know, YOU'VE run out of hearts. And if you think you've gained something from me anyway because of all the ads, well, I HATE ALL YOUR SPONSORS. Temu, for instance, REALLY LOW TRUST RATING HERE. You seem to belong to the same club! To anyone reading this, DON'T EVEN TRY THIS PIECE OF SHIP.