Boatload Puzzles is the home of the world's largest supply of crossword puzzles. You can play as many of the puzzles as you want in a day for free online, and the online puzzles work great on both traditional computers and mobile devices. However, if you have an iPad, iPhone, or Android tablet or phone, you may also be interested in the free Boatload Puzzles Daily Crosswords app.
The disadvantage of the app compared to the online puzzles is that the app only lets you play one puzzle each day. But there are also a couple advantages of the app over the online puzzles: