Codable vs Kanna Mobile

Codable turns programming practice into a habit. Solve focused challenges in ten languages — from your first data structure to lock-free concurrency — and build real fluency one problem at a time. WRITE REAL CODE IN 10 LANGUAGES C, C++, C#, Go, Java, JavaScript, Python, Rust, Swift, and TypeScript. Switch languages anytime — solve the same challenge in Python today and Rust tomorrow. GO DEEPER THAN SYNTAX Challenges span the topics that actually make you a better engineer: • Fundamentals and string manipulation • Data structures and algorithms • Recursion and functional programming • Object-oriented design and generics • Error handling, concurrency, and memory management BUILT FOR EVERY STAGE New to programming? Start with fundamentals and level up steadily. Experienced? Jump straight into concurrency, memory management, and the problems that show up in technical interviews. PRACTICE THAT STICKS Short, focused challenges designed to fit into a daily routine — because fluency comes from reps, not marathons. Download Codable and start mastering your chosen language!

Kanna Mobile is a companion for the Kanna desktop app for macOS. It lets you follow and steer coding-agent tasks from your iPhone while the work runs on your Mac. Kanna Mobile requires a Mac running the Kanna desktop app. It is not a standalone coding-agent host, and it does not run agents on your phone. WHAT YOU CAN DO • See every task across your repositories, grouped by status and activity • Open a task and watch its terminal and agent output stream live • Send follow-up instructions when an agent stops and asks a question • Start new tasks against a repository and agent of your choosing • Review diffs and file contents an agent has touched • Get a notification when a task needs you TWO WAYS TO CONNECT On your local network, pair directly with your Mac by scanning a QR code. No account, no sign-up, nothing leaves your network. Away from home, cloud access relays the connection between your phone and your Mac. Cloud access needs a Kanna account and is currently invite-only — request one at kanna.build/support. BUILT FOR PEOPLE RUNNING SEVERAL AGENTS Kanna gives every task its own git worktree, branch, and agent session, then moves it through a workflow: implement, review, pull request. Kanna Mobile is the window into that from wherever you ff before lunch, an agent stuck on a question, a reviewyou want to read on the train. Kanna works with the coding-agent CLIs you already have installed on your Mac. A NOTE ON WHAT YOU'LL SEE Kanna is a developer tool. It displays repository names, branch names, task prompts, and raw terminal output from your own machine. Requires the Kanna desktop app for macOS, available at kanna.build.