While you can still download the ESV Bible app for free, Crossway has now announced that you can get the ESV Bible + app (the ESV Study Bible) for iPad and iPhone (and iPod Touch). For the next 48 hours, you can get the ESV Bible + app for $9.99, after which it will be at the introductory rate of $12.99 until Aug. 7. After that it will go for $14.99.
While that may seem like a steep price for something you can get for free (the ESV Bible app), you have to remember that the print version of the ESV Study Bible goes for $49.99. The ESV Study Bible is an amazing resource and to be able to carry that around with you in your pocket it amazing.