When I first got the app, it wouldn’t open at all. When I did get it to work, I was greeted with a bright, tacky app that looks like an early 2000s website made for 9 year olds. Looking past the appearance, some questions appear out of date (population is described as 6 billion people and other things like that). It does give the option to test in specific subjects which is really nice, but overall, the app is not worth any money.