AlgoLens vs HTML Playground

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.

Learn HTML, practice with quizzes, and generate real code, all in one app. HTML Playground is built for beginners who want a clear path and for developers who want fast, reliable HTML generators in their pocket. LEARN HTML STEP BY STEP Follow 55 short, focused lessons across 8 sections: Basics, Attributes, Text and Formatting, Forms, Tables and Media, Semantic HTML, Head and SEO, and a full Tag Reference. Every lesson comes with real code examples and pro tips, so you understand not just what to write but why. TEST YOURSELF WITH QUIZZES Answer 163 questions across 13 categories with instant feedback. Skip and go back freely, or jump into random quiz mode for a mixed challenge. Earn XP, climb six levels from Beginner to HTML Master, and beat your best score in every category. DAILY CHALLENGE Five fresh questions every day to keep your skills sharp. Earn bonus XP and build a daily streak that rewards you for showing up. 82 HTML TOOLS AND GENERATORS Stop memorizing syntax. Generate clean, ready to use HTML in seconds with one tap copy. Most tools also include a live preview. The toolbox includes generators for: • Buttons, links, and mailto and tel links • Forms and every input type, including text, email, password, date, number, range, color, file, and more • Tables, lists, and description lists • Images, responsive images, video, audio, and iframes • Meta tags, viewport, charset, favicon, page title, and canonical URL for SEO • Semantic tags, headings, blockquotes, and formatting • Utilities such as HTML formatter, HTML minifier, tag remover, link extractor, HTML to text, and HTML to Markdown Your most used tools appear right on the home screen for instant access. CHEAT SHEET 53 essential HTML tags on one searchable page. Tap to copy any tag, or share it in a second. The fastest way to find the tag you need. STAY MOTIVATED Unlock 12 achievement badges for XP milestones, quizzes, perfect scores, completed lessons, and tools used. Watch your XP, level, and day streak grow as you learn. MADE FOR YOU • Light and dark themes to match your style • Haptic feedback for a responsive feel • Favorite tools for quick access • All progress stored locally on your device WHO IS IT FOR • Students learning web development and HTML for the first time • Self taught coders who want structured practice • Web developers who need quick, accurate HTML snippets • Anyone preparing for coding interviews or exams