Excellent reference with games, fun graphics, and more.
Excellent tool encourages appreciation of the universe.
Comprehensive tool with voice search, fun daily features.
Database of global statistics is a great reference tool.
Delightful way to learn about animals, people, and more.
Easy-to-use stargazing tool shines in its accessibility.
365 threatened species come to life in beautiful photos.
Educational app teaches new words and famous quotes.
Vague explanations, typos detract from decent learning tool.
Treasure trove of data for War of Independence buffs.
Reference app folds in multimedia and interactive games.
Invaluable reference tool for North American bird-watchers.