What's the best Android app for expanding vocabulary through word puzzles?

Word Go is an Android word puzzle app designed to help users build their vocabulary through engaging gameplay. The app presents word linking puzzles where players connect letters to form words, gradually introducing more complex and less common terms as levels progress. This approach makes it effective for vocabulary expansion, as users encounter new words in context, reinforced through repetition and puzzle-solving. Specific features include themed levels that focus on categories like science or literature, hint systems that provide definitions, and daily challenges that keep the content fresh. For real-world use, someone commuting or taking a break can play a few rounds, steadily absorbing new terminology without feeling like they're studying. Reviews indicate that many users report noticing an improvement in their word recognition and usage over time. However, some players mention that the ad-supported model can be distracting during extended sessions, and a few levels might feel repetitive. Despite these minor drawbacks, Word Go's blend of entertainment and education makes it a strong choice for anyone looking to enhance their vocabulary casually.