EpistIQ: Brain Puzzles
Quiz, Trivia & Brain Games
Free · In‑App Purchases
Quiz your way through Philosophy, Science, Medicine & Informatique, plus Block Blast and Jigsaw bonus games. New Gold puzzle every Sunday.
Stay sharp, one question at a time. EpistIQ is a daily brain-training habit built for genuinely curious people: thousands of fact-checked questions across four serious subjects, plus two relaxing bonus games, all in one app.
PHILOSOPHY (200 puzzles)
Explore the ideas that shaped how we think, from ancient Greece to modern ethics: logic, epistemology, political thought, and the great philosophers themselves.
SCIENCE (200 puzzles)
Physics, chemistry, biology, and astronomy: understand the world through discovery, from Newton's laws to the periodic table to the science of the cosmos.
MEDICINE (200 puzzles)
Human anatomy, physiology, disease, and the history of medicine: general knowledge trivia for the curious, not a substitute for medical advice.
INFORMATIQUE (200 puzzles)
Computer science fundamentals, algorithms, programming concepts, and the history of computing, for anyone who codes or wants to think like it.
Every category has four difficulty tiers (Easy, Medium, Hard, Pro), so you can start where you are and work your way up. The first 10 Easy and first 10 Medium questions in every category are free to play, no account gymnastics required.
BONUS GAMES
Block Blast: a fast, relaxing block-clearing puzzle for a quick mental break between quiz sessions.
Jigsaw: 30 fixed levels (10 Easy 3x3, 10 Medium 4x4, 5 Hard 5x5, 5 Pro 6x6), plus 20 subscriber-exclusive Gold levels featuring real world landmarks.
GOLD (subscribers only)
A brand-new quiz puzzle every Sunday, all year long: 50 puzzles and counting, never ad-unlockable, always fresh.
COMPETE AND COLLECT
A live leaderboard ranks you by category, with your own title from newcomer to expert. Achievement badges track your streaks and mastery as you go.
GO PREMIUM
EpistIQ Smart unlocks everything at once: every category, every difficulty, both bonus games in full, the complete leaderboard, weekly Gold puzzles, a custom username, and a completely ad-free experience.
Available today in English and French, with more languages planned in future updates.
EpistIQ Smart is an auto-renewing subscription (Monthly or Yearly). Payment is charged to your Apple ID at confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple ID account settings.
Terms of Use: https://aiguidia.com/epistiq/terms
Privacy Policy: https://aiguidia.com/epistiq/privacy_policy
Ratings & Reviews
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The developer, IT KEYS LLC, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Contact Info
- User Content
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- IT KEYS LLC
- Size
- 59.7 MB
- Category
- Trivia
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later.
- iPhone
- Languages
- English and French
- Age Rating
4+
- 4+
- Contains
Advertising
User-Generated Content
- In-App Purchases
Yes
- EpistIQ Smart Monthly $2.99
- EpistIQ Smart Yearly $19.99
- Copyright
- © Copyright 2026 IT KEYS LLC