What would be the ★-rating of this review (★ being the lowest and ★★★★★ being the highest)? "wow"
★★★★★

What would be the ★-rating of this review (★ being the lowest and ★★★★★ being the highest)? "best instant messaging app!"
★★★★★

What would be the ★-rating of this review (★ being the lowest and ★★★★★ being the highest)? "Usefully"
