App was great until updates at the end of 2021. T After this, the sets I updated on the website were not reflected in the app, even after a few days. Now I cannot even log in from my Android phone after reinstalling (that was their helpdesk recommendation when I first raised this issue) so not able to use my Plus subscription, paid until November. Website works fine so it is not a question of Quizlet not being accessible in China where I am based.