GR Tube vs CS++ AP CSA

Grade Results provides online courses and a comprehensive set of credit recovery, credit acceleration, remediation, alternative and special education services to the public, private, charter, and alternative schools, as well as community colleges and universities. Grade Results is research-based and offers an extensive, personalized, and ever-expanding curriculum powered by a cutting-edge, one-to-one delivery system.

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.