It's been the most vital fortnight before uni and you guys still haven't fixed the issue. Blank screen. Nothing shows except the background. I can not use your app and I need it to understand linear algebra. Samsung A2 core. My internet connection is fine. Please fix. And 2. Stop telling everyone with an issue to report a ticket. This is my ticket. We're not here to chase it up for you. I'm miffed without Khan on the phone, but I'm not gonna die if I can't use it. Take or leave my review.