How I Use It
I assigned this app to students who were not challenged by our class vocabulary lists. It was assigned on an individual basis based on my gatherings from student data, or was assigned to students whose parents wanted them to begin preparing for the SAT ahead of time. Some positives about the app are that students can listen to each word's pronunciation, learn them at their own pace, and then test themselves when they feel they are up for it. With that said, it is best for a motivated learner and likely not an app for an ELL student.
A few things that did not work were that the app simply needs more words. A highly-motivated student could run through these words quite quickly. Also, the app does not give example sentences, which are an integral way to learn and build vocabulary. They do offer a button to search for the word on the internet, but that can be cumbersome if a student does not know many of the words they are learning.
Overall I believe this tool is good for motivated students who want to build their vocabulary or study for a test such as the SAT. I like the "revision lists" that are offered, as other vocabulary apps I have seen do not have this feature. I really wish that the app was offered for Apple ios, as it is only offered in the Android market right now. I think it would also be great if the app had some sort of game features so that students could play games with the words to better gain meaning and allow the words to become a part of their established vocabulary.