It's good, but it's really hard to figure out how to use this app. Most apps are a lot more intuitive. Figuring out how to use it kind of eats into the time I set aside to study, so I don't use it as much as I'd hoped I would be able to when I bought it. So whether it's because of either my technical illiteracy or that this app is just really not that easy to use, I don't feel as though I'm getting the value for money I could get from it. The content is certainly there to be had. Also, the extra studies you can buy in-app look interesting but I haven't bought any of them. I think I've spent enough on this app as it is. I'd hesitate to recommend this.