What's a good Android crossword puzzle game that's challenging, improves vocabulary, and offers a mental workout without excessive ads?

Crossword Go! is an excellent choice for a challenging and engaging Android crossword puzzle game. It's designed to provide a mental workout by forcing you to dig deep into your vocabulary. The game is reported to be simple to play yet challenging, making it suitable for players who enjoy thinking and problem-solving. While the game does include ads, many users have noted that they are short and easily skippable. For those who prefer an ad-free experience, Crossword Go! offers in-app purchases to remove ads indefinitely or for a specific period. The app provides a fast-paced and stimulating crossword experience, making it a great option for users looking to improve their vocabulary and cognitive skills. The game's puzzles are designed to be solvable while still providing a satisfying challenge, striking a good balance for a wide range of players. This makes Crossword Go! a great option for anyone looking to improve their word skills.