Stack Quest

Learn software development the way you would learn a language: a few minutes every day, with real practice and spaced review. Stack Quest turns coding, system design, generative AI and machine learning into short sessions you can finish on the bus. Every session is exercises with explanatory feedback — multiple choice, match the pairs, put the steps in order, estimate the numbers, arrange the code, fill the blank, predict the output, and write real JavaScript that runs on your phone against tests. What you got wrong comes back when you are about to forget it. Streaks, XP and a daily goal measure days of real practice, not taps. WHAT YOU GET • 14 courses: System design, Service code, Generative AI, Machine learning, Python, JavaScript, Data Structures & Algorithms, Databases & SQL, TypeScript, Web & APIs, Git & collaboration, DevOps & Cloud, Security, Testing & craft • 108 units, 589 sessions, more than 7,200 exercises • Test out of any unit you already know • Works offline, and you can start without an account • Nothing is graded by a chatbot: tests and answer keys decide FREE AND FULL ACCESS The first unit of every course is free, permanently. Full Access opens every unit of every course, plus the projects. • Full Access, Monthly — $9.99/month • Full Access, Yearly — $59.99/year, which saves 50% New subscribers get a 7-day free trial, once per account. Payment is charged to your Google Play account when the trial ends. Subscriptions renew automatically unless you cancel at least 24 hours before the current period ends. Cancel any time in Play Store > Payments and subscriptions > Subscriptions; cancelling during the trial costs nothing. Prices are shown in your local currency before you buy. Terms of Use: https://stackquest.dev/terms Privacy Policy: https://stackquest.dev/privacy Course content adapted from SystemDesigner (systemdesigner.net), CC BY-SA 4.0.