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Cobalt - Book Summaries
Skip the pages, keep the ideas !
Cobalt turns non-fiction bestsellers into 5-15 minute summaries you can tailor to your goal: Actionable, Scientific, or Key Takeaways. 300+ titles, offline mode, in 5 languages. Learn from the best books without the 300-page commitment.
Hey everyone 👋,
I’m Théo, the solo founder behind Cobalt.
This one comes from a frustration I’ve had for years : I love personal development books, I genuinely think they teach some of the most essential things you can learn. But let’s be honest: they’re long. And when you’re a student or working full-time, finding those hours is hard.
Worse, it’s so easy to fall into passive reading: highlighting, nodding along, and forgetting everything a week (or minutes)later, while these books are literally about taking action.
So I built Cobalt to fix exactly that!
Under the hood, it runs a custom LLM specialized in summarizing books, made by myself: it doesn’t just shorten them, it extracts the actionable concepts, the things you can actually apply to your life. You can even pick the angle you want: actionable steps, the science behind it, or just the key takeaways.
And it all lives in a scrollable, minimalist interface designed to “trick” your brain: the same effortless scroll that keeps you on social media, except this time you come out smarter. Zero friction, ultra-intuitive.
Cobalt is a mobile app, available on iOS and Android. There are 300 books right now (and I keep adding more), it’s native in 5 languages (EN, FR, ES, DE, IT), and it works offline.
I’d genuinely love your honest feedback: what’s missing for Cobalt to become part of your daily routine? That’s exactly what I’m trying to figure out. I’m here all day to answer 🙌
Thank you in advance for your help :)
Have a nice day
Théo
About Cobalt - Book Summaries on Product Hunt
“Skip the pages, keep the ideas ! ”
Cobalt - Book Summaries was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #160 on the daily leaderboard. Cobalt turns non-fiction bestsellers into 5-15 minute summaries you can tailor to your goal: Actionable, Scientific, or Key Takeaways. 300+ titles, offline mode, in 5 languages. Learn from the best books without the 300-page commitment.
On the analytics side, Cobalt - Book Summaries competes within Android, Productivity, Artificial Intelligence and Books — topics that collectively have 1.3M followers on Product Hunt. The dashboard above tracks how Cobalt - Book Summaries performed against the three products that launched closest to it on the same day.
Who hunted Cobalt - Book Summaries?
Cobalt - Book Summaries was hunted by Théo Rousseau. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Cobalt - Book Summaries including community comment highlights and product details, visit the product overview.
Théo Rousseau