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 or iPhone, 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:

• The app doesn't display ads, leaving more room for the puzzle on the mobile device's small screen.
• The app tries to ensure that you always have one puzzle available to play each day, even if you don't always have internet access.

The Boatload Puzzles Daily Crosswords app is available on Apple's app store.