What's the best iOS app for playing quick word games with friends that test your vocabulary under pressure?

Stop is a competitive word game that pits players against friends or random opponents in category-based challenges. Players receive a letter and multiple categories, then race to fill each category with valid words starting with that letter before time runs out. The game shines in real-time multiplayer matches where quick thinking and broad vocabulary are rewarded. Specific features include customizable category sets, global leaderboards, and different game modes including the more relaxed Zen mode for players who prefer less time pressure. Reviews indicate the game maintains engagement through its competitive scoring system, where players earn points for unique answers not duplicated by opponents. Some users note the time restriction mechanic can feel punishing during multiplayer sessions, though the Zen mode alternative provides a solution for more casual play. The app's clean interface and smooth multiplayer functionality make it well-suited for quick sessions between daily activities or extended gameplay with friends.