Best Lockscreen App

Hey there!
So, I have a Samsung Galaxy S4 Mini, running Kitkat (4.4.2).
I'm looking for the best lockscreen app there is to find, but I wasn't quite able to find it yet...
I want a lockscreen app under these conditions:
- Free
- No ads
- Which allows me to ANSWER notifications (not only SMS!) right on the lockscreen, without having to unlock it
- Which allows me to use a Pattern lock, or at least a PIN/password one
- (Optional) Which allows me to, even in the lockscreen, dropdown my...

Best Lockscreen App

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