Think Again

Test Your Thinking

Only for iPhone

Free · In‑App Purchases

iPhone

Challenge your thinking with classic philosophy experiments. Compare your responses with thousands. Discover biases you didn't know you had. Discover how you really think. ThinkAgain brings classic philosophical thought experiments to your pocket. Challenge your intuitions, uncover hidden biases, and compare your reasoning with thousands of others. EXPLORE TIMELESS QUESTIONS • Mary's Room: Can you learn something new from experience that no amount of facts could teach you? • Valid or Invalid: Test your logical reasoning with syllogisms that have stumped students for centuries. • Battleground God: Navigate a minefield of 17 statements about God and morality. Can you reach the end without contradicting yourself? • Philosophical Health Check: Examine 30 pairs of beliefs. How many tensions lurk in your worldview? • Carneades' Dilemma: Face an impossible choice at sea. What would you do when there's no right answer? • The Trolley Problem: Should you push the fatman? Four variations on philosophy's most infamous dilemma. • The Wason Selection Task: A deceptively simple logic puzzle that exposes how context shapes reasoning. • The Framing Effect: Watch your preferences flip based on how options are presented. • The Drowning Child: If you'd save a drowning child, why not donate to charity? Peter Singer's challenge. • Who Said It?: Match quotations to philosophers. Harder than it sounds. UNDERSTAND YOUR PATTERNS After each experiment, receive detailed analysis of your responses. Discover your: • Reasoning style and cognitive biases • Consistency across related questions • Performance compared to global averages • Tendency toward certain philosophical positions COMPARE WITH THOUSANDS See how your responses stack up: • Global statistics across all users • Breakdowns by age, education, and country • Real-time data updated as more people participate • Anonymous and privacy-focused UNLOCK DEEPER INSIGHTS Upgrade to Premium for: • Detailed demographic comparisons • Advanced pattern analysis • Unlimited access to all features • One-time purchase, no subscription DESIGNED FOR DISCOVERY • Beautiful, distraction-free interface • Clear explanations of philosophical concepts • No ads, no tracking, no algorithmic feeds • Works offline for experiments you've completed GROUNDED IN RESEARCH These aren't arbitrary questions. Each experiment is based on real philosophical thought experiments that have shaped debates in ethics, epistemology, logic, and metaphysics. ThinkAgain makes them accessible without dumbing them down. YOUR DATA STAYS YOURS • All results stored locally on your device • Optional anonymous sharing for statistics • Delete everything with one tap • No personal information collected Whether you're a philosophy student, a curious skeptic, or someone who enjoys a good mental workout, ThinkAgain offers a unique window into how you think—and how that compares to everyone else. Download now and start questioning your assumptions.

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The developer, Jeremy Stangroom, 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 Linked to You

    The following data may be collected but it is not linked to your identity:

    • User Content
    • Usage Data
    • Sensitive Info

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Information

  • Seller
    • Jeremy Stangroom
  • Size
    • 10.4 MB
  • Category
    • Education
  • Compatibility
    Requires iOS 16.0 or later.
    • iPhone
      Requires iOS 16.0 or later.
  • Languages
    • English
  • Age Rating
    13+
  • In-App Purchases
    Yes
  • Copyright
    • © 2026 Jeremy Stangroom
  • Privacy Policy