This app was mentioned in 2 comments, with an average of 1.00 upvote
You should look into Nclex Mastery by Higher Learning Technologies on the appstore, google play or they have a web app.
This app is gold its less expensive than buying the physical study matierials, and I know several people who failed the test a few times and swear this helped them pass. Has sections that help you figure out the best way to study. I'm not a nurse just big into following startups and such and this one is making a huge splash in the education area. Idk which app you specifically need but this is one of there apps they are huge in the nursing Community at the University of Iowa https://play.google.com/store/apps/details?id=com.hltcorp.hesi sorry if not allowed.
https://play.google.com/store/apps/details?id=com.hltcorp.hesi
Try this much cheaper than actual books and it works!