This app has the NASB available: https://f-droid.org/en/packages/net.bible.android.activity/

However, if you're going to try to read the Bible, I've found that you have to reconcile yourself to the fact that it is not a single book, but a collection of books written in several ancient dead languages. There are numerous English translations that span the range of dynamic and formal equivalence. The app I linked has some great language tools built in that can help with trying to understand the original meaning.