AlgoLens vs Graphica

AlgoLens teaches coding patterns the way they actually click — through real-world stories, interactive visualizers, and guided practice. Instead of memorizing abstract algorithms, see why and where each pattern is used in real software systems: • Fraud detection → Sliding Window • Duplicate payments → HashMap • Undo / Redo → Stack • Recently Played → Arrays • Friends of friends → Graph BFS • Calendar conflicts → Merge Intervals Eight pattern paths so far: • Arrays • HashMaps • Two Pointers • Sliding Window • Stack & Queue • Trees • Graph Basics • Merge Intervals Each lesson includes: • A real-world story that anchors the pattern in memory • An interactive visualizer — step through, play, watch the work happen • Guided practice problems with explanations • An interview-ready breakdown with time/space complexity, vs. brute force, and a Swift code sample in a syntax-highlighted editor Practice mode adds three coding game types: • Fill in the blanks — tap a token, drop it into the right slot • Sort the code — shuffled lines, tap two to swap them into order • Find the bug — read the function, tap the line that doesn't match the title Stack streaks, earn XP, and filter puzzles by the companies that ask similar questions in interviews — Google, Meta, Apple, Amazon, Microsoft. Built for mobile-first learning. iPhone-sized, dark code editor styling, short focused lessons designed for the in-between moments. Understand patterns visually. Remember them through stories. Apply them like real engineers.

Graphica turns abstract graph theory into something you can actually see. Build your own graphs or load sample ones, then watch nine classic algorithms run step by step — from breadth-first and depth-first search to Dijkstra's shortest path and minimum spanning tree algorithms like Kruskal's and Prim's. FEATURES • 9 graph algorithms, visualized step by step • Pinch-to-zoom canvas for graphs of any size • Synchronized pseudocode panel — see exactly which line is executing • Ready-made sample graphs to explore immediately • Build and edit your own custom graphs • Fully native SwiftUI, built for iOS PRIVACY FIRST Graphica works completely offline. No account, no ads, no analytics, no tracking — your data never leaves your device. Whether you're a computer science student preparing for exams, a developer brushing up before technical interviews, or simply curious how these algorithms work, Graphica makes graph theory click.