purely and simply

Absolutely; essentially; plainly so, without having to say any more or less. This "educational app" they are promoting is purely and simply an interactive advertisement. Their performance was purely and simply phenomenal.

put simply

set phrase In clearer, more direct, or more easily understandable terms. Used when discussing a complicated topic or situation. A: "What the heck is a cholecystectomy?" B: "Put simply, it's the surgical removal of the gallbladder, something we do here at the hospital everyday. We'll take good care of your husband." A: "Put simply, he's a fool, and he never deserved you." B: "Well, don't mince words, Mom."

simply put

In clearer, more direct, or more easily understandable terms. Used when discussing a complicated topic or situation. A: "What the heck is a cholecystectomy?" B: "Simply put, it's the surgical removal of the gallbladder, something we do here at the hospital everyday. We'll take good care of your husband." A: "Simply put, he's a fool, and he never deserved you." B: "Well, don't mince words, Mom."

to put it simply

set phrase To say something in clearer, more direct, or more easily understandable terms. Used when discussing a complicated topic or situation. A: "What the heck is a cholecystectomy?" B: "To put it simply, it's the surgical removal of the gallbladder, something we do here at the hospital everyday. We'll take good care of your husband." A: "To put it simply, he's a fool, and he never deserved you." B: "Well, don't mince words, Mom."