Debugging vs AlgoMotion

Debugging: Inside the Machine is a free debugging-practice arcade platformer for students preparing for AP Computer Science Principles or AP Computer Science A. You're inside a corrupted machine — find the USB Key, fix the glitches, and escape the firewall before the system collapses. CSP and CSA modes ship in the same app. Tap once to switch. — EASY · MED · HARD — Each difficulty is a different level, with its own glitch tilemap and its own question bank. CSP topics: Selection, Iteration, Functions & Lists. CSA topics: Variables · Strings, Iteration · Loops, Arrays · Recursion. Two bonus levels (K-Pop Demon Hunters, Minecraft) unlock when you've cleared all three difficulties. — CODE LENS — Glitches scatter across each level as collectible bugs. When you're in range, the CODE LENS button pulses on screen. Tap it and a real multiple-choice debugging question appears: read the broken code, pick the actual bug from four explanations, and the glitch repairs. Wrong answer? Stability drops 10 percent. Right answer? Stability recovers 5 percent and the level inches closer to stable. — Real questions, not filler — Every question is hand-written and scoped to AP exam topics. No random AI hallucinations, no off-curriculum trivia. The pseudocode reference card (CSP) and Java Quick Reference (CSA) are one tap away during any question. — Built for phones and tablets — Touch controls only. Bottom-left D-pad to move, big JUMP button on the right, hold for higher jump. Question screens use full-size answer buttons. Designed for landscape iPhone and iPad. — Offline, no account, no tracking — Everything ships in the app. The game makes zero network calls, collects zero analytics, and requires no sign-in. — More from CS++ — A "More from CS++" button connects you to the rest of the CS++ family: the AP CSP and AP CSA full-curriculum apps, the CS++ Java IDE for on-device Java practice, and the free csplusplus.com web resources (curriculum, vocab trainer, practice exams). For: AP CSP and AP CSA students, CS teachers building exam prep sessions, anyone who likes finding bugs.

AlgoMotion is an algorithm learning app designed for beginners, now available on both iPhone and iPad. It turns abstract concepts such as recursion, search, stacks, queues, and dynamic programming into interactive animations, step-by-step explanations, and quick practice exercises, helping you truly understand how algorithms work. In AlgoMotion, an algorithm is not just static code or a simple video. Each chapter is built around a specific problem: you can read guided explanations, watch algorithm states change step by step, pause, move forward, go back to key steps, and then use quizzes to check whether you really understand the concept. Whether you are learning with short sessions on iPhone or using iPad for a more immersive animation-based study experience, AlgoMotion aims to make algorithm learning more visual, clear, and easier to reason through. Key Features: * Animated algorithm demonstrations: Visualize processes such as recursive calls, queue changes, search expansion, and state transitions. * Step-by-step playback control: Pause, move forward, and go back to review important steps repeatedly. * Code and animation synchronization: In supported chapters, highlighted code lines are synchronized with the current animation state. * Chapter-based learning path: Progress from basic concepts to common algorithm models with a beginner-friendly structure. * Chinese and English content support: Useful for Chinese learners and for comparing algorithm terms in English. * Practice and feedback: Use chapter quizzes to check your understanding instead of simply watching once and moving on. * iPhone and iPad support: Optimized learning, animation, and practice experiences across different screen sizes. Who is AlgoMotion for? * Students who are starting to learn algorithms * Developers who want to strengthen their data structures and algorithms foundation * Learners who find recursion, search, or dynamic programming hard to visualize * Anyone who wants to study and review algorithms on iPhone or iPad * Beginners who want to understand how algorithms run through animation AlgoMotion has one simple but important goal: to turn algorithms from “invisible processes” into something you can observe, reason through, and truly understand. Some advanced content may require membership access. Specific prices and available plans are subject to the information shown inside the app. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/