Today’s Best Apps features the most promising releases from the last 24 hours. Thousands of apps get approved by Apple daily and we hand-select what we think are the new potential gems that we’re considering for review each day.

Universal:

DK Quiz by Dorling Kindersley (Free, 24.4 MB): The DK Quiz is an educational quiz game for iOS. The app features thousands of questions on all sorts of different topics. You can play solo and check out your score on the leaderboard. The app allows you to check your overall rank and also lets you go head-to-head in a turn-based quiz mode with friends.

Gameloft LIVE! by Gameloft (Free, 194.5 MB): Gameloft brings you a 3-D gaming environment where you can socialize with your friends. The app allows you to create a digital avatar and customize your apparel and the environment. You can build your gamer score and get rewards and trophies to unlock more items. The app allows you to access your favorite Gameloft titles with a tap.

iPhone:

PDFpen for iPhone by SmileOnMyMac, LLC ($4.99, 27.1 MB): Edit PDF files on the go with PDFpen for the iPhone. The app allows you to fill in applications, make comments, and sign contracts. You can also modify files and delete, move, or resize images. The app also lets you store documents in iCloud or Dropbox.

iPad:

Olly Browser by MetaCert (Free, 5.4 MB): Olly Browser is an app designed to make surfing the Web safe for families as well as for kids in school. The app blocks up to 630 million inappropriate pages. You can also block websites manually. The app syncs with iCloud across multiple devices.

Envelope HD by Jérôme Zattoni ($1.99, 27.6 MB): Envelope HD is a challenging puzzle game for the iPad. The objective of the game is to overlap geometric shapes by dragging points with your fingers. The more you cover the object, the higher your score will be.

That’s it for today. Did we miss anything?