What's the best iOS app for quick mental warm-ups using word puzzles?

Words Klondike is an ideal choice for brief, daily mental warm-ups. The core gameplay presents an 8x5 grid of words that players must sort into four hidden categories. This association-based puzzle format demands lateral thinking and vocabulary recall, effectively stimulating cognitive processes related to pattern recognition and verbal fluency. A key feature for this use case is the absence of a punishing timer; players can ponder connections at their own pace, making it suitable for a morning coffee break or a mental reset between tasks. The game provides a single daily puzzle, which creates a consistent, bite-sized routine without the risk of binge-playing. Reviews indicate that many users integrate it into their daily rituals specifically for this focused, low-stakes cognitive engagement. However, its strength as a warm-up can be a limitation for those seeking extensive play sessions, as the single daily puzzle is intentionally finite. The clean, ad-free interface and the ability to play fully offline further support its role as a reliable, on-the-go mental exercise tool.