This app is helpful in quick explanations. However, when I needed some expanded information, I had to go online to look it up. I came across some great websites with much more detailed explanations. This app was helpful as a very brief reminder of some things that I had forgotten, but absolutely not worth the price. Additionally, I should have looked for an app that had some practice problems with it, but that was my own fault for not thinking of it.
concernednow about GRE