In an era where expertly researched encyclopedias are nearly extinct and crowd-sourced ones often contain faulty data, Geo Walk HD – 3D World Fact Book is a breath of fresh air. Loaded with information in easily digestible nuggets, the app makes learning truly fun. And a quiz mode helps owners review what they’ve learned (or test their existing knowledge) in an entertaining fashion. Rather than focusing on space or theoretical concepts, the app sticks to the real world, but finds plenty of unheard of creatures that might as well be aliens — like the Blobfish or Fishing Cat. This is, hands down, one of the best educational apps in the App Store.

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