We're here to help you get the most out of ThinkAgain
ThinkAgain is an iOS app featuring interactive philosophical thought experiments. Complete classic philosophical scenarios, discover patterns in your thinking, and compare your responses with thousands of users worldwide through rich statistical analytics.
Yes! ThinkAgain is free to download and use. All experiments are accessible without payment. A one-time Premium purchase unlocks detailed demographic breakdowns and advanced analytics, but the core experience is completely free.
Premium users get:
Free users still see global statistics for every experiment.
ThinkAgain Premium is a one-time lifetime purchase through the App Store (not a recurring subscription).
To restore Premium on this or another iPhone:
1. Open ThinkAgain → Profile tab
2. Scroll to the bottom
3. Tap "Restore Purchases"
4. Make sure you're signed in with the same Apple ID used for the original purchase
All purchases are processed through Apple's App Store. Refunds are subject to Apple's refund policy. You can request a refund through Apple at reportaproblem.apple.com.
After completing 1-3 experiments, you'll be prompted to optionally share demographic information (age, education, etc.). This is entirely optional and helps improve the analytics for everyone. You can also add or update this information anytime in the Profile tab.
Yes! Go to the Profile tab → scroll to the bottom → tap "Delete All Data". This will permanently remove all your experiment results and profile information from your device. Server-side analytics data is anonymous and cannot be individually deleted.
ThinkAgain includes experiments covering:
Yes. We collect only anonymous experiment responses and optional demographics. We do not collect names, email addresses, or any personally identifiable information. See our Privacy Policy for full details.
Make sure you have an active internet connection. The app requires internet access to fetch analytics and insight cards. Your experiment results are saved locally even without internet.
Try these steps:
1. Open ThinkAgain → Profile tab
2. Scroll to bottom → tap "Restore Purchases"
3. If issues persist, check you're signed in with the Apple ID used to buy Premium
4. Try restarting the app
Try force-quitting the app and reopening it. If problems persist, please contact us with details about when the crash occurs and what you were doing in the app.
Can't find what you're looking for? Have feedback or found a bug?
We'd love to hear from you.
We typically respond within 1-2 business days
ThinkAgain was created by Jeremy Stangroom, who has been developing interactive philosophical thought experiments since the late 1990s. Jeremy holds a PhD in political sociology from the London School of Economics and is co-founder of The Philosophers' Magazine.
The experiments have been completed over 3.6 million times on PhilosophyExperiments.com, and ThinkAgain represents a complete reimagining of this work specifically for iOS.