CS++ Intro to Java vs Stepwise

CS++ Intro to Java is a complete first programming course for iPhone and iPad — 10 units and 31 lessons that take you from your very first println to 2D arrays, fully offline. Lessons embed 60 runnable Java coding challenges, 63 inline multiple-choice checks, and 22 Parsons problems — all executed on-device by a bundled Java interpreter. No account. No ads. No tracking. No internet required. WHAT'S INCLUDED • 31 lessons across 10 units — from your first program to 2D arrays • 60 runnable coding challenges — write real Java and run it on-device, no JDK, no compile server • 63 inline multiple-choice checks • 22 Parsons problems — drag code blocks into working order • Variables, operators, Strings, conditionals, loops, classes, arrays, ArrayLists, and 2D arrays • Everything works fully offline — progress stays on your device UNIT 1 IS FREE FOREVER Unit 1 — Getting Started with Java (3 lessons) is unlocked at install. Write and run real programs, and decide if the rest is worth $9.99. UNLOCK FULL INTRO TO JAVA — $9.99 ONE-TIME A single in-app purchase unlocks all 10 Intro to Java units (60 coding challenges): Unit 2. Variables & Primitive Types Unit 3. Operators & Expressions Unit 4. Strings & Using Objects Unit 5. Boolean Expressions & Conditionals Unit 6. Loops & Iteration Unit 7. Writing Your Own Classes Unit 8. Arrays Unit 9. ArrayLists Unit 10. 2D Arrays Pay once, keep forever. Restores on any device signed in to the same Apple ID. No subscription. Future content updates included. PRIVACY Everything runs on your device. The app does not require an account, does not collect personal information, does not include analytics or advertising, and does not track you across apps. Your progress stays on your device. See csplusplus.com/privacy for details. WHO IT'S FOR • Complete beginners writing their first line of code • Intro programming students who want practice anywhere, with or without Wi-Fi • Teachers who want a tablet-friendly tool for in-class practice • Anyone headed toward AP Computer Science A — the CS++ AP CSA course picks up right where this one leaves off For the full browser Java IDE, per-unit quizzes, and timed practice exams, visit csplusplus.com.

Don't watch BFS run. Be BFS. Stepwise is a daily training game for software engineers, built for a phone: tap, drag and swipe. There's no typing on a tiny keyboard. BE THE ALGORITHM Execute real algorithms by hand on freshly generated inputs. Tap nodes in the order breadth-first search visits them, pick which node Dijkstra settles next, sift a value through a heap, probe a sorted array like binary search. Every move is scored, and the puzzles never run out. THE DAILY SET Five challenges, the same for every developer that day. Keep your streak and share a spoiler-free result card. A RATING THAT MEANS SOMETHING Every topic has its own Elo, like chess puzzles. Difficulty adapts to you. MORE GAMES Big-O Blitz, Bug Hunt, Line Up, Output Oracle (Java, Python, SQL), Pick the Structure and Pattern Spotter. There is also an Engineering track: race conditions, SQL traps, index choice. Every answer is checked: generated puzzles take their answer key from the real algorithm, and code snippets are verified by actually running them. Challenge a friend with a link to the exact puzzle you just solved. Your full history is saved, so you can replay anything you missed.