If you want a more powerful program for more advanced Bible study, then you may want to consider Logos Bible Software.  Logos has a free app for mobile devices, but if you want the full power available for use on a computer it will come at a cost.  This program is the most powerful Bible study software I know of, but it is not free.

There are a variety of packages available.  They all use the same engine.  The difference is in what Bibles, commentaries, books, and other study aides are packaged in with it.

If you just want to read the Bible, take notes, and do basic searches then you may want to go with e-Sword or the YouVersion Bible-app, which are available for free.  But if you want more study power, and you can afford to pay for it, then Logos is worth considering.