Quiz for Android Devs

How well do you really know Kotlin?

Quiz for Android Devs is a fast, addictive streak quiz to sharpen your Kotlin knowledge. One question, four options. Get it right and your streak grows. Miss one and it resets to zero. How long can you go?

Every answer comes with a short explanation, so you are not just guessing, you are learning. Questions cover real Kotlin used by Android developers: null safety, collections, coroutines and flow, scope functions, generics, sealed and data classes, and more.

WHAT YOU GET
• 100 hand-written Kotlin questions, junior to mid level, free
• Premium packs: Claude Code and AI Coding Tools, 100 questions each. Buy a pack once and it is yours forever
• Build the longest streak you can, your best streak is saved
• A clear explanation after every answer
• Share your best streak and challenge your friends
• Works offline, optional account, no ads
• English and Spanish

Perfect for Android developers brushing up before an interview, students learning Kotlin, or anyone who likes a quick brain workout on the commute.

Think you can keep the streak alive?