# Cobalt : Book Summaries — Self-Growth & Business Ideas

> AI-powered book summaries for self-growth and business knowledge. (iPhone/iPad app by Theo Rousseau.)

- Source: https://appshunter.io/ios/app/cobalt-book-summaries/id6746136038 (this page in markdown: same URL + `.md`)
- Developer: [Theo Rousseau](https://appshunter.io/developer/1814683681)
- Category: Education, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.4 · 132 MB
- Languages: French (France)
- Released: 2025-07-31
- Data updated: 2026-08-24
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/cobalt-book-summaries/id6746136038/reviews.md

## What is Cobalt?

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.

## Key features

- Custom AI summaries
- Actionable, Scientific, Key Takeaways formats
- Elite library of 300+ titles
- Business, Psychology, Biography categories
- Offline reading mode
- Reduced eye strain interface

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Weekly Premium subscription. | $3.99 | per 7 days |
| Abonnement Annuel (-40%) | $29.99 | per year |
| Abonnement Mensuel (-40%) | $2.99 | per month |
| Cobalt Abonnement Annuel | $49.99 | per year |
| Cobalt Abonnement Mensuel | $4.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Influence & Communication | $3.99 | one-time |
| Parcours Vitalité & Santé | $3.99 | one-time |
| Moment Présent | $3.99 | one-time |
| Pack Complet - Tous Parcours | $22.99 | one-time |
| Sport & Performance | $3.99 | one-time |
| Mindset & Psychologie | $3.99 | one-time |
| Entrepreneuriat & Business | $3.99 | one-time |
| Cobalt Lifetime | $99.99 | one-time |


## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/cobalt-book-summaries/id6746136038/reviews.md

### 5/5 — Très belle découverte

*2026-06-01*

J’utilise tous les jours depuis 3 semaines en allant au travail

### 5/5 — Une appli au top pour apprendre efficacement !

*2025-08-15*

Le concept est génial, genre Koober (résumé de livres) mais en mis à jour et totalement personnalisé et avec plus de choix ! 

En plus, j’ai écrit à l’équipe pour proposer une fonctionnalité, en 10h elle a été rajoutée alors qu’on est un jour férié, j’hallucine !!! 😳🤩😍

Félicitations c’est vraiment top, merci à la team et excellente continuation à cette appli !

### 5/5 — Excellent

*2025-08-06*

Très bonne application qui permet d’avoir un résumé pertinent des livres sélectionnés

### 5/5 — Application intéressante

*2025-08-04*

Permet de gagner beaucoup de temps grâce à un résumé pertinent du contenu d’un livre.

### 5/5 — Top ⭐️⭐️⭐️⭐️⭐️

*2025-08-04*

Super application qui mérite un franc succès !

A télécharger sans hésitation : l’essayer c’est l’adopter et ne plus pouvoir sans passer

## Frequently asked questions about Cobalt

### What is Cobalt's learning methodology?

Cobalt utilizes AI to generate customized book summaries, allowing users to choose between 'Actionable', 'Scientific', or 'Key Takeaways' formats. This adaptive approach aims to cater to individual learning preferences and needs.

### How does Cobalt track user progress?

The provided data does not specify progress tracking features within Cobalt. The app focuses on delivering concise summaries for quick learning and knowledge acquisition.

### Does Cobalt offer certifications?

Cobalt is designed for personal learning and knowledge acquisition through book summaries. It does not offer formal certifications upon completion of summaries or reading material.

### What are the subscription tiers for Cobalt?

Cobalt offers several subscription plans, including a Weekly Premium subscription for $3.99, a Monthly Subscription for $2.99 (with a 40% discount), and an Annual Subscription for $29.99 (with a 40% discount). There are also higher-tier monthly and annual Cobalt subscriptions available.

### How can I cancel my Cobalt subscription?

Information on how to cancel a Cobalt subscription is not detailed in the provided data. Typically, subscriptions can be managed through the app store where the purchase was made.

### What is the update frequency for Cobalt?

Cobalt was last updated on July 22, 2026, indicating a recent update. The app's version is 2.1.01, suggesting regular development and feature additions.

### Is Cobalt available on Android devices?

Cobalt is currently supported on iPhone and iPad devices. Information regarding Android compatibility is not provided in the current data.

### What do users like most about Cobalt?

User sentiment data is not available in the provided description. However, the app highlights its exclusive custom AI summaries and an elite library of over 300 titles as key advantages.

## Version history (last 5 releases)

### 2.1.01 — 2026-07-22

- Bugfixs

### 2.0.0 — 2026-06-17

- Design changes

### 1.6.4 — 2026-06-14

- Interface improvements
- New themed tours
- Bug fixes

### 1.6.03 — 2026-04-13

- Bug fixes

### 1.6.02 — 2026-04-09

- New widgets
- Bug fixes

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*