There is an android version as well. It's fast, easy to read, works offline, and makes it simple to leave notes or highlights. I'm not personally used to the NASB translation, but the app is quite nice.

I started writing out the features that I'd like to have in an ideal Bible app, such as multiple translations, commentaries, etc. But I remembered that I used sites like Bible Hub and Bible Gateway regularly. It didn't occur to me until now that they might have apps, and sure enough, they do! Bible Gateway offers an offline mode, but you have to create an account first in order to download specific versions of the text. Bible Hub is little more than a wrapper of the website, even advertising the app within the app.