Google Plus & Google Photo App

[AlliGe]

I recently downloaded the Google Photo App to my phone & transferred all my photos to the app (chose the unltd storage). It seems that I somehow have Google Plus which I never use & really don't want. My question(s).....Do I need Google Plus to use the Google Photo App? If I delete Google Plus, will I lose my pictures? Can I disable or make Google Plus totally private. I don't even use Hangouts.
thanks in advance for your help

 

[STARGATE]

You don't have to use G+ if you don't want to.
By default, all pictures uploaded to Photos are private, only you can see them.

 

[AlliGe]

thanks, so it's safe for me delete Google Plus.