For awhile the app was fine. Then 1 day it just went all while except for the mercari logo. No way in. I tried resetting phone, uninstalling & reinstalling app. Tried logging in and out from online. I got ahold of helpline and they did nothing. The next day a seller I bought from asked me to cancel a purchase, I had no way to respond to them & no way to cancel. So I sent another message to help line. I guess I just wait and hope I get my money back. Ridiculous.