Avast Mobile Security /Avast Cleanup/Avast Battery Saver

Hi this is my first post here. New to all this. My question is does my phone really need all of this? Avast Mobile Security /Avast Cleanup/Avast Battery Saver
I tend to add a bunch of stuff on my phone like this. What I am wondering is what I really need to keep my phone running smoothly? Looking for advice. Thanks.
Oh it's a Samsung Galaxy S5

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