CS++ AP CSA vs Semicolon

CS++ AP CSA is the complete AP Computer Science A course in your pocket — fully offline, with a real Java runtime built in. WHAT YOU GET • 11 units covering every topic in the College Board AP CSA Course and Exam Description (CED) • Hundreds of multiple-choice and Parsons-puzzle practice questions, with hints and explanations • 50+ inline Java coding challenges that run on your device — no internet required • Topic-by-topic explanations, code examples, and "common error" callouts • Progress saved on-device, persistent across sessions • Unit 1 (Primitive Types) is free; full course unlocks for $9.99 (one-time) THE 11 UNITS 1. Primitive Types & Output 2. Booleans & Conditionals 3. Iteration 4. Strings 5. Arrays 6. 2D Arrays 7. ArrayList 8. Recursion 9. Classes & Objects 10. Inheritance & Polymorphism 11. Searching & Sorting WHY OFFLINE The bundled Java runtime executes code locally on your device. The lesson content is shipped with the app — no streaming, no fetching, no slow connections. Use it on a plane, a school Chromebook with locked Wi-Fi, or anywhere with no signal. WHY CS++ We've taught AP CSA online at csplusplus.com to teachers and students across the United States. This app distills the full course into a focused practice tool. Same content, same alignment to the 2025-26 College Board CED, same Java subset — packaged for the device that's always in your pocket. PRIVACY No account creation. No sign-in. No analytics or tracking. All progress lives in app storage on your device. No data is sent to our servers. THE PURCHASE The free tier covers Unit 1 — enough to evaluate the lesson format and the inline Java runtime. The full unlock is a one-time $9.99 purchase that unlocks all 11 units forever, with no subscription. WANT THE EDITOR ALSO? For a free-form Java environment with multi-file projects and a templates menu, see our companion app CS++ Java IDE — same Java runtime, just an editor instead of a course. AP, Advanced Placement, and AP Computer Science A are registered trademarks of the College Board, which is not affiliated with and does not endorse this app. Built by Yellow Dart Publishing.

Semicolon is a set of programming courses for your phone. Every exercise uses real code in the language you're studying. Question types include multiple choice, fill in the blank, fix the bug, predict the output and write the function. COURSES - ARM64 Assembly: how a CPU runs your code - Python - Rust - Kotlin - SwiftUI - Discrete Math - Design Patterns: the 23 classic patterns - Data Structures & Algorithms Each course has 24 sections and starts from the basics. LESSONS Lessons are short. After each answer you get an explanation of why it was right or wrong. Every lesson has a manual page with the full concept if you want to read it first. If you already kno a timed test to skip it. FREE AND PRO ARM64 Assembly and Python are free. There is no trial period or time limit. Semicolon Pro is a one-time purchase that unlocks the other six courses. There is no subscription, no ads, and no hearts or lives. There is a streak counter, but nothing gets locked if you miss a day. Your progress is stored on your device. There is no account or sign-in.