Cosmo: Learn GenAI & More

CodeSignal

In-app purchases

About this app

Build real skills in just minutes a day. No videos. Just doing.

Cosmo is your personal AI tutor, always ready with hands-on lessons that adapt to you. Whether you're between classes, commuting, or on a break, you’ll make real progress in GenAI, business, tech, and more.

Built by CodeSignal, the AI platform 3,000+ top employers trust for hiring — including Google, Meta, Zoom, Netflix, TikTok, and Anthropic. Loved by over 1 million learners who build and prove their skills with CodeSignal.

🎯 Why Cosmo?
• Cosmo, your AI tutor, guides your journey and adapts to you so you learn faster.
• Cosmo makes learning fun. With practice-based lessons, you'll build real skills in just a few minutes a day.
• Master the most in-demand skills to grow your career.
• Earn shareable certificates and skill badges to show off all you've learned.
• Learn through courses or have Cosmo help you practice any topic instantly.

📚 Every course is free. Learn GenAI, business, marketing, sales, finance, accounting, product management, project management, leadership, communication, emotional intelligence, Python, JavaScript, Go, Swift, Kotlin, Rust, web development, cloud, SQL, data science, analytics, machine learning, data engineering, personal finance, focus, decision making, critical thinking, public speaking, habit formation, and more.

💼 Learn 200+ career-building skills
GenAI
Understand how ChatGPT works and how to apply GenAI at work. Practice prompt writing and explore AI use cases across roles and industries.

Finance
Learn finance, economics, accounting, public markets, and how businesses are valued.

Marketing
Build skills in digital advertising, branding, SEO, content, and demand generation.

Coding
Learn to code in Python, JavaScript, Go, Swift, Kotlin, and Rust. Understand the web and cloud from the ground up.

Data
Practice SQL and Python for data science. Get started with analytics, machine learning, and data engineering.

Leadership
Improve communication, people skills, and strategic thinking. Choose tracks for engineers, sales, recruiters, first-time managers, and students.

Personal Growth
Learn focus, confidence, habit formation, clear decision making, and personal finance.

Startups
Turn ideas into action with courses on starting a tech company, local business, or creator brand.


✨ If you like Cosmo, try Cosmo+ to master skills faster with unlimited energy.

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Ratings and reviews

I am super impressed with this app. it's intuitive so I imagine it could be easily used by just about anyone. the houses are set up in a very approachable way and I like the "reward" style set up. as you master the paths of learning, you are awarded different badges based on the curriculum. this makes it easy to see what you're learning and maybe even a little more fun. we all love that dopamine hit. free version is great, paid version is probably well worth it.

The app is nice (I'm learning Python) but energy runs out very quickly in the free version. It interrupts learning and I suspect lots of people will lose patience and uninstall the app. To prevent this, the creators can include ads for free users (similar to Duolingo). Personally, I don't mind the ads - all I care about is interrupted learning. I'm sure the creators can earn money from people like me, even if I don't purchase the paid version.

The app is good, the interface is okay, the interactions are excellent and the progression is coherent and logical. Above all the tokenization and certification system is awsome and very rewarding. The only problem is that after 86 days of uninterrupted use I was logged off and I was unable to log in again. I hope developers will address this issue.