Codewise 1.4 adds Python Design Patterns, a new module with 16 hands-on challenges. Build a Singleton with a shared instance, lazy creation, __new__, and a reusable decorator, and see how it can leak state between tests. Then practice dependency injection: pass dependencies in, swap implementations, use a fake for testing, and wire it all together with a tiny container. Codewise now has more than 280 challenges across Python, Swift, JavaScript, Java, Kotlin, C#, and SQL, all with live error hints and instant results, no account and no subscription. Thank you for learning with Codewise! If it has helped you, a rating on the App Store makes a big difference for a small indie app.

Codewise 1.3 adds functional programming. The new C# Functional module teaches lambdas, Func and Action delegates, closures, and LINQ pipelines with Where, Select, OrderBy, Aggregate, and more, across 24 hands-on challenges that run entirely on your device. Chain calls across lines, pass functions as values, and compose them, the way you would in a real codebase. Codewise now has more than 280 challenges across Python, Swift, JavaScript, Java, Kotlin, C#, and SQL, all with live error hints and instant results, no account and no subscription. Thank you for learning with Codewise! If it has helped you, a rating on the App Store makes a big difference for a small indie app.

NEW: SQL (PostgreSQL) module — 30 hands-on challenges covering CREATE TABLE, INSERT, SELECT, WHERE, ORDER BY, GROUP BY, HAVING, JOINs, subqueries, UPDATE and DELETE. Results are shown just like psql. IMPROVED: Live error hints for SQL, including the classic "double quotes vs single quotes" mistake. Thank you for learning with Codewise! If it has helped you, a rating on the App Store makes a big difference for a small indie app.

Initial release — hands-on coding challenges across 6 languages, built-in code editor with syntax highlighting, and real-time code execution.