Apps keep returning after deleting

[Ala7x]

I was just surfing the net then after I go back to home screen I noticed a new app exist (Easy calc) so I deleted it but after some time it comes back I keep deleting and it returning I noticed also that there is other too apps with android icon that is not in screen (Android innovation,Support) that keep returning after deleting them I reset my phone data but still I used safe mode but nothing too tryed antimalware app still nothing
And my chrome homepage has changed
Please help
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Android 6.0
Leagoo z6

 

[Ala7x]

can u suggest me a app that can fix this and please can you give me some screen shots I can't really understand you
I don't have DT ignite

 

[Ala7x]

apps installing by itself

For first there was a app that I stalling it self after deleting when I'm offline I went to root files in phone and I delete the apk file but when I connected to the internet it comes again
Any solution?

 

[belodion]

Two threads merged.