Why The Psalms Are Like The App Store

I have an app addiction. Anytime I come across an interesting app, I have to download it. Sure, I tend to only use said app for roughly 13 seconds before burying it in a folder somewhere deep within the recesses of my phone, but that’s beside the point. The genius of the “app explosion” is that there is an app for virtually everything you can imagine - money management, tracking calories, reading blogs, tracking tasks - you name it, and "there’s an app for that". 

I think the book of Psalms has a lot in common with the App Store.