s4 show notification previews on lock screen?

Apr 26, 2016
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How do I make,my s4 show notification previews on the lock screen? It is a kitkat currently. It does show text messages and emails on the lock screen. but I want it to show everything else. (Kindle notifications, google hangouts stuff, etc) so how do I do that?
 
You get a lockscreen app that can, like hi locker or next lockscreen. This functionality wasn't available on Kitkat, hence the need for a separate app.