I would be careful about putting any pro-religious app on your device. First, if you are putting xian or islam apps on your device (including bibles and qurans), you are using your device to donate energy to the cause of ruining our future as humanity. Is that what you want?
Second, apps take space. When you only have 16 GB for everything, every app counts. You are not just running a MP3 player--this thing has to be for videos, music, browser, pictures, and everything else. The more apps you install, the more wasted space you run into. Also, they tend to hog resources when too many are open at once. And those washtowel apps are just as guilty as the "apostate" ones. I would rather use a bigger device for apostate or Satanic apps (such as a home system, or one where you have several TB of storage instead of 16 or 32 GB).
And why is so much of the information in the wild about jokehovian witlesses so negative? You get no benefit from this stupid religion, and anywhere there is any freedom to cross reference it, you are going to see the problems inherent with it. If the religion was sound, you would see more comments where it is a very good program, albeit with a few faults. (The closest I can think of is many products L.L. Bean sells. They have mostly good reviews, but there are a few where they misused a product, had bad luck, or are trying to slander the company. Most of their products are very good, but have tradeoffs or minor flaws. That is what I would expect from a good religion or program.) On the other hand, what I am seeing is more akin to walmart (mostly negative comments in the wild).