How to use smart Cleaner? and how to disable APP auto-run in the background？

[Jivian]

I can't find How to use Smart Cleaner, and how to  disable APP auto-run  in the background？

[Jivian]

why???

no one reply to me even a word Until now!!!
Am‘I in a un-Sony forum???

[najodleglejszy · Accepted solution]

Smart Cleaner is enabled by default and does its thing automatically without you having to do anything. you can check this by going to Settings > Storage & Memory > Smart Cleaner, there should also be a brief description of its function.

[Jivian]

Then，how to  disable APP auto-run  in the background？