iphone 7 as far as i am aware (done some homework ) has crop edit.thats all.i have just done this on mine with latest update only yesterday ( 11.0 os ) it will let you reduce its size but not area. its either square or rectangular which is achieved by moving the corners.but no sizes ever are offered overall only different size boxesor rectangles. the only reason i could do this photo was after i had sent it to my p.c from my iphone in atatchment and then downloaded to my pictures . i presume its size was reduced substantialy via text mail as atatchment. im no expert but it looks like windows 7 you can do it but thats now removed and they want you to buy a photo edit type app. hope others can share some knowledge as you can see im not too savy with these things ..
im on windows 10 .... thanks