Cobalt : Book Summaries
Theo Rousseau Education iPhoneiPadiPod touch
Cobalt : Book Summaries is a free Education app for iPhone and iPad by Theo Rousseau. Requires iOS 16.4. Updated July 22, 2026.
- Price
- Free
- on the App Store
- Size
- 132 MB
- Age 4+
- Updated
- Jul 22
- 2026 · v2.1.01
Screenshots
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
Alternatives to Cobalt : Book Summaries
Looking for apps like Cobalt : Book Summaries? Here are 6 similar apps on the App Store. The highest rated is Lumen: Bible & Prayers (4.9/5), and all 6 are free to download.
-
Lumen: Bible & Prayers
4.9
-
Translate Up:TOP AI Translator
4.4
-
Français sans Fautes - Grammar
4.6
-
Emma: Learn Languages
4.6
-
Micro Learning Daily - Sparkle
4.7
-
WRD - Learn Words
4.7
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| Cobalt : Book Summaries | – | Free | July 22, 2026 | |
| Lumen: Bible & Prayers | 4.9 / 5 (707) | Free | Oct 27, 2026 | Compare |
| Translate Up:TOP AI Translator | 4.4 / 5 (171) | Free | Aug 31, 2026 | Compare |
| Français sans Fautes - Grammar | 4.6 / 5 (431) | Free | Oct 16, 2026 | Compare |
| Emma: Learn Languages | 4.6 / 5 (3,985) | Free | May 14, 2026 | Compare |
| Micro Learning Daily - Sparkle | 4.7 / 5 (1,768) | Free | Feb 25, 2026 | Compare |
| WRD - Learn Words | 4.7 / 5 (2,778) | Free | Oct 21, 2026 | Compare |