Q: iPhone and iPad have same prob meticlogs and awdd ?? Darwin Kernel version?! what

HI guys

my iPhone 5 has had a bug ! I have restored restarted re/DID ? and still has major issue. ( exs download,email probs, apps re configugere themselves

ssettings change ) also I just bought an iPad2 it's affected now , must be an email bug if that's possible? I know very little if anything about tech stuff . but am reading alot and really getting into it, i've noticed that it bounces between the Apps, I wouldn't notice it normally it's just that the Settings that it changes it go weird ,  it constantly changes from Google to yahoo in the browser,  now what I think , could be absolutely miles off though!! Im thinking it starts with apps that my ex partner and I shared and I've downloaded them, I then after  fair while I decided to get my own apple ID, looking back now I realise it should nt  have been as hard as it turned out, it kept refusing my emails and passwords ! now I have a few Apple IDs iCloud's and email addresses that for another day !!! i've also got a PlayStation 4 if that comes into it,  haven't jailbreak either device, But everything I'm reading is leading me to think that some how it has! IS THAT POSSIBLE???? by itself?

can I or is there like a virus checker for iPhone iPad apps and all, ! in bloody everything in my devices as they are all linked?

thanks is guys hopefully not to long-windedly just Ggggggg

thanks  in advance