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  • Cobalt : Book Summaries screenshot 1
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About Cobalt : Book Summaries

No time to read? Stop feeling guilty about your unread book pile. Cobalt turns global bestsellers (Business, Psychology, Finance) into powerful 5, 10, or 15-minute summaries. WHY CHOOSE COBALT? While other apps force a standard summary on you, Cobalt uses cutting-edge AI to adapt to YOUR brain. [+] EXCLUSIVE: CUSTOM AI SUMMARIES Tired of generic or shallow summaries? - Want practical steps? Ask for an "Actionable" summary. - Want the theory? Ask for a "Scientific" summary. - Want the basics? Ask for "Key Takeaways". You decide the structure. It is unique in the world. [+] AN ELITE LIBRARY (300+ TITLES) No fluff. Only books that change lives: - Business: Rich Dad Poor Dad, The 4-Hour Workweek... - Psychology: Atomic Habits, The Four Agreements... - Biographies: Elon Musk, Steve Jobs... [+] LEARN ANYWHERE On the subway, during a coffee break, or before bed. Our reading interface is designed to reduce eye strain. Offline mode included to read without data. LAUNCH OFFER Download Cobalt now to turn every spare moment into a learning opportunity.

What’s new

Version 2.1.01 · Updated July 22, 2026

- Bugfixs

App privacy

The developer, Theo Rousseau, reported these privacy practices to Apple.

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Usage Data: Product Interaction, Advertising Data

Data Not Linked to You

The following data, which may be collected but is not linked to your identity, may be used for the following purposes:

  • Usage Data: Advertising Data, Product Interaction, Other Usage Data

Used for: Developer’s Advertising or Marketing, Analytics, Product Personalization, App Functionality

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