Worst app I've ever used. Everything you go to use the app to operate your printer you have to sign into your hp account, which would gave been done when you set up the printer at the start. But every time you try to sign in it says its taking too long and to try later. That's useless when you need to do something. Despite trying and trying it won't allow you to sign in. So I have now downloaded a different app which works perfectly. HP smart app is totally useless.