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Cobalt : Book Summaries icon

Cobalt : Book Summaries

Theo Rousseau
Self-Growth & Business Ideas
Open in App Store ↗
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168 of 168 storefronts
Content in en-US
Age Rating
4+
Years
Developer
Theo Rousseau
Language
EN
Size
216
MB

Information

Apple ID6746136038
Bundle IDcom.zewcro.cobalt
SellerSeller
Min iOS16.4
Min macOS12.0
Device familiesiphone, ipad
Released2025-07-31
Copyright© 2026 - Optu Corp
WebsiteLink ↗
Privacy policyLink ↗

Preview 2 platforms

iPhone 8 images

iPhone screenshot
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iPhone screenshot

iPad 6 images

iPad screenshot
iPad screenshot
iPad screenshot
iPad screenshot
iPad screenshot
iPad screenshot

What’s New Version 2.0.0

- Design changes

Description

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.

In-App Purchases BB pricing

Abonnement Annuel (-40%) Subscription
Yearly—
Abonnement Mensuel (-40%) Subscription
Abonnement Mensuel (-40%) · Monthly—
Weekly Premium subscription. Subscription
7 days—
One-Time Purchases
Parcours Vitalité & Santé—
Moment Présent—
Pack Complet - Tous Parcours—
Sport & Performance—
Mindset & Psychologie—
Entrepreneuriat & Business—
Cobalt Lifetime—

Capabilities

In-App Purchases

Accessibility

ipadiphonemacrealityDevicetvoswatch

Version history 25 versions

Build 887048619v2.0.02026-06-17 08:36:49
- Design changes
Build 886893886v1.6.42026-06-14 06:46:45
- Interface improvements - New themed tours - Bug fixes
Build 884431267v1.6.032026-04-13 00:09:21
- Bug fixes
Build 884329863v1.6.022026-04-09 21:51:50
- New widgets - Bug fixes
Build 884102504v1.5.42026-04-06 13:42:39
[+] Bugs fix [+] ES lang support
Build 883031388v1.5.12026-03-04 21:40:04
[+] Bugs fix
Build 882762237v1.4.22026-02-26 10:32:13
[+] Bugs fix
Build 882668912v1.4.12026-02-22 17:54:40
Bugfixs
Build 882655666v1.4.02026-02-21 18:00:53
[+] Bugs fix
Build 882525868v1.3.102026-02-17 16:24:46
Audio has arrived! Cobalt’s biggest update yet is here. We’ve listened to your feedback to make your learning experience even simpler and more seamless. [+] NEW: Audio Summaries No need to stay glued to your screen anymore. Now, you can listen to the essentials of your favorite books in just 5 minutes—whether you're at the gym, out for a walk, or busy cooking. [+] A Redesigned Interface We’ve improved the design for a more comfortable reading experience: clearer text, better contrast, and simplified navigation so you can focus on what matters most: knowledge. [+] Welcome Home We have completely revamped our home screen to guide you step-by-step from the moment you open the app. Discovering your next book has never been faster. [+] Performance & Stability We’ve hunted down and fixed several bugs to provide you with the smoothest experience possible. [+] Bugs fix
Build 881945974v1.3.22026-02-16 19:47:58
Audio has arrived! Cobalt’s biggest update yet is here. We’ve listened to your feedback to make your learning experience even simpler and more seamless. [+] NEW: Audio Summaries No need to stay glued to your screen anymore. Now, you can listen to the essentials of your favorite books in just 5 minutes—whether you're at the gym, out for a walk, or busy cooking. [+] A Redesigned Interface We’ve improved the design for a more comfortable reading experience: clearer text, better contrast, and simplified navigation so you can focus on what matters most: knowledge. [+] Welcome Home We have completely revamped our home screen to guide you step-by-step from the moment you open the app. Discovering your next book has never been faster. [+] Performance & Stability We’ve hunted down and fixed several bugs to provide you with the smoothest experience possible.
Build 881641133v1.2.132026-01-20 19:06:15
- Bug fixs - UI changes
Build 881053754v1.2.122026-01-08 14:38:08
Bug fixes Multi-language support
Build 880817683v1.2.92025-12-18 22:19:28
- bugfix
Build 880529090v1.2.82025-12-11 12:27:37
- Bugfixs :)
Build 880338096v1.2.72025-12-10 00:06:58
Bugfixs :)
Build 879983862v1.2.02025-12-03 10:14:59
We listened to your feedback. Cobalt is stepping up a gear with some highly requested features: - SPECIAL LIFETIME OFFER: Hate subscriptions? So do we. Take advantage of our new “Lifetime” offer: pay once, get access to everything forever. - TEST YOURSELF: Test your knowledge after each summary with new interactive quizzes. - THEMATIC COURSES: Stop reading at random. Follow our guided programs to master a subject from A to Z (Leadership, Productivity, Finance, etc.). - YOUR JOURNAL: Track your progress and reading series day by day. This version also introduces new, more flexible subscription options and free access supported by advertising. Update now to accelerate your growth! Translated with DeepL.com (free version)
Build 880316959v1.2.22025-12-03 23:20:10
We listened to your feedback. Cobalt is stepping up a gear with some highly requested features: - SPECIAL LIFETIME OFFER: Hate subscriptions? So do we. Take advantage of our new “Lifetime” offer: pay once, get access to everything forever. - TEST YOURSELF: Test your knowledge after each summary with new interactive quizzes. - THEMATIC COURSES: Stop reading at random. Follow our guided programs to master a subject from A to Z (Leadership, Productivity, Finance, etc.). - YOUR JOURNAL: Track your progress and reading series day by day. This version also introduces new, more flexible subscription options and free access supported by advertising. Update now to accelerate your growth! Translated with DeepL.com (free version)
Build 878143981v1.1.82025-09-16 07:55:33
- Bugs fix
Build 877887972v1.1.52025-09-07 13:12:08
Your library has just been taken to the next level! Imagine: you are browsing a collection, and with a single gesture you can rearrange, search, archive or start your next reading. Without interruption. Without changing pages. This update doesn't just add features, it transforms your experience. It is your time that is respected and your organization that is simplified. Discover fluidity and control you never thought possible. Update and become the master of your collection! => Dynamic search + bug fixes
Build 877486332v1.1.42025-08-26 07:49:51
Your library just got a whole new level! Imagine this: you're browsing a collection, and with a single tap, you can reorganize, search, archive, or start your next read. Without interruption. Without changing pages. This update doesn't just add features; it transforms your experience. It respects your time and simplifies your organization. Discover a fluidity and control you never thought possible. Update and become the master of your collection!
Build 877387635v1.1.22025-08-20 06:13:30
- Bugs fix
Build 877348323v1.1.12025-08-18 23:31:57
New: Dark Mode is Here! You asked, we listened! Dive into a new, more comfortable, and elegant visual experience. Perfect for your late-night reading, Dark Mode reduces eye strain and gives your app a modern, sleek look. Enable it with a single tap from the header and enjoy!
Build 877289176v1.1.02025-08-15 16:34:27
New: Customize Your Reading Comfort! You now have full control over the font size of your summaries. Whether you prefer larger text for an easy read or smaller text to fit more content on the screen, it's now possible. How does it work? On a summary's reading page, you'll find new, simple icons: + to enlarge the text. - to reduce it. A reset icon to instantly return to the default size. We hope this improvement makes your reading experience even more enjoyable. Your comfort is our priority!
Build 877108510v1.0.82025-08-11 06:09:38
- UI/UX improvements
Abonnement Annuel (-40%)

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Availability 168 of 168 storefronts

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Change log 29 changes · BB

✎
releaseNotes updated
- Design changes
✎
description updated
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-min
✎
subtitle updated
Self-Growth & Business Ideas
✎
name updated
Cobalt : Book Summaries
◆
Version 2.0.0 released
- Design changes
◆
Version 1.6.4 released
- Interface improvements - New themed tours - Bug fixes
◆
Version 1.6.03 released
- Bug fixes
◆
Version 1.6.02 released
- New widgets - Bug fixes
◆
Version 1.5.4 released
[+] Bugs fix [+] ES lang support
◆
Version 1.5.1 released
[+] Bugs fix
◆
Version 1.4.2 released
[+] Bugs fix
◆
Version 1.4.1 released
Bugfixs
◆
Version 1.4.0 released
[+] Bugs fix
◆
Version 1.3.10 released
Audio has arrived! Cobalt’s biggest update yet is here. We’ve listened to your feedback to make your learning experience even simpler and more seamless. [+] NEW: Audio Summaries No need to stay glued to your screen anymore. Now, you can li
◆
Version 1.3.2 released
Audio has arrived! Cobalt’s biggest update yet is here. We’ve listened to your feedback to make your learning experience even simpler and more seamless. [+] NEW: Audio Summaries No need to stay glued to your screen anymore. Now, you can li
◆
Version 1.2.13 released
- Bug fixs - UI changes
◆
Version 1.2.12 released
Bug fixes Multi-language support
◆
Version 1.2.9 released
- bugfix
◆
Version 1.2.8 released
- Bugfixs :)
◆
Version 1.2.7 released
Bugfixs :)
◆
Version 1.2.2 released
We listened to your feedback. Cobalt is stepping up a gear with some highly requested features: - SPECIAL LIFETIME OFFER: Hate subscriptions? So do we. Take advantage of our new “Lifetime” offer: pay once, get access to everything forever.
◆
Version 1.2.0 released
We listened to your feedback. Cobalt is stepping up a gear with some highly requested features: - SPECIAL LIFETIME OFFER: Hate subscriptions? So do we. Take advantage of our new “Lifetime” offer: pay once, get access to everything forever.
◆
Version 1.1.8 released
- Bugs fix
◆
Version 1.1.5 released
Your library has just been taken to the next level! Imagine: you are browsing a collection, and with a single gesture you can rearrange, search, archive or start your next reading. Without interruption. Without changing pages. This updat
◆
Version 1.1.4 released
Your library just got a whole new level! Imagine this: you're browsing a collection, and with a single tap, you can reorganize, search, archive, or start your next read. Without interruption. Without changing pages. This update doesn't ju
◆
Version 1.1.2 released
- Bugs fix
◆
Version 1.1.1 released
New: Dark Mode is Here! You asked, we listened! Dive into a new, more comfortable, and elegant visual experience. Perfect for your late-night reading, Dark Mode reduces eye strain and gives your app a modern, sleek look. Enable it with a
◆
Version 1.1.0 released
New: Customize Your Reading Comfort! You now have full control over the font size of your summaries. Whether you prefer larger text for an easy read or smaller text to fit more content on the screen, it's now possible. How does it work? O
◆
Version 1.0.8 released
- UI/UX improvements
expanded screenshot