100 Things You Should Know

Learn, quiz & master 100 facts

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

How much do you actually know? Start with 100 World concepts, then unlock Science, History, Money, Language, Music and Technology. How much do you actually know? 100 Things You Should Know turns general knowledge into something you can see, test and complete. Each subject is a finite set of exactly 100 essential ideas. Start with World included, then unlock Science, History, Money, Language, Music and Technology as one-time packs. Every pack gives you: • A 100-item knowledge map that fills as you learn • A quick self-assessment to find what you already know • Clear explanations, examples and memory hooks • Learn mode for focused practice • Quickfire, True or False, What Am I? and Knockout challenges • Mastery tracking that highlights weak areas and what to revisit next The goal is not to read another textbook. It is to find out what you know, discover what you do not, and watch the gaps disappear. World is included with the app. Additional subject packs are optional one-time in-app purchases. There are no subscriptions.

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The developer, Thomas Richardson, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

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    Information

    Seller
    Thomas Richardson
    Size
    1.5 MB
    Category
    Education
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English
    Age Rating
    4+
    In-App Purchases
    Yes
    • Music Pack $1.99
    • Technology Pack $1.99
    • Language Pack $1.99
    • Money Pack $1.99
    • History Pack $1.99
    • Science Pack $1.99
    • Learn More
    Copyright
    © 2026 Lanchester Research & Design
  • Developer Website
  • Privacy Policy

    • More by Thomas Richardson

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