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 fell in love with this app. Then it broke my heart ! I had the same positive experience mentioned by others at first. I developed a learning routine that lasted 47 days. I had new skills, and excitement for the future. after completing 387 course units, the model deleted 37,000 points. okay they're just points. but they were mine, and, they were stolen. Why? Did I learn much in those 47 days, not really. I've got 65 useless certificates. it's a fun game, but that's all.

I was prompted by the Google Play store to install this "free" app. I was excited to use it and learn some stuff. I was able to do this for about 10 minutes before it started asking me to pay for continued usage. *updated* I am able to go back every day for about 10 more minutes of learning. It's free, but at this rate, the technology may be obsolete before I complete my lessons. I do like the content, and it's helping an old guy like me understand how AI works. I don't plan on being replaced.

I hope the app will continue to invest in free learning, right now the learning paths are forced to pause because of "Cosmo running out of energy" followed by advertisement to purchase subscription or end the user session. I look forward to seeing the application evolve its learning experiences. It's easy to use and easy to learn. Thank you!