
The jump from the Galaxy Z Flip to the Flip 3 was huge; Samsung overhauled nearly everything for the better and dramatically dropped the price from $1,449 to $999, making foldables palatable for the first time. The leap from the Flip 3 to the Flip 4 is noticeably smaller.
The Flip 4 is the best foldable for its form factor — a phone that folds in half horizontally into a smaller one — but that's only because nobody else is competing. At least not in the U.S. (yet). Here in the States, if you want this kind of foldable, the Flip 4 is the one to get because it's the only one to get. The next best option is the Flip 3.