Your sarcasm is uncalled-for. Nigeria is not the United States. If normal people are making the equivalent of about $100/mo, and most apps are around $1-$2, then a $10 app should probably be killing snakes for them.
What's probably going on here is that people aren't aware of how to get the Bible on their phone for free, and are still paying a lot less than it takes to get a hard copy.
Very expensive 10$
Choose one please.
I don't know about those particular apps, but an era where any piece of software over 1.99$ is considered expensive is a very sad one.