You must uninstall these apps fully, simply deleting them is not enough you have to
get the full uninstall instructions form the developers of those apps Avast Trend Micro and CleanMyMac.
Remove the Memory Clean app, you can simply delete that from your Applications folder.
The mac does not need any added help to manage the RAM memory.
If you open the Activity Monitor app which is in your Applications> Utilities folder
and click on the Memory tab, at the bottom of that window you will see a graph
of the memory usage. If it is green then you have no concerns. If it goes amber then your
mac is working hard but it is using a lot of memory. If it goes red then your mac is beginning
to run out of memory, at that point you should think about reducing the number of apps
open and reducing the number of tabs open in internet browsers.
Your mac is designed to use the RAM as efficiently as possible, so let it do that.
A lot of people install an app to alleviate a perceived problem, the problem does not go
away so they try another app, the problem does not go away, they install another
app. In no time you have apps installed that are all working against your mac operating
system causing slow downs, beach balling, hair pulling and writing posts here.
Use your mac wisely, you'll have more fun. Learn about your mac
you paid a lot of money for it, they are not scary.