HTML Playground vs GeometrAI

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

GeometrAI is all of high-school geometry, made visual. LEARN EVERY TOPIC 137 topics, from points and angles to proofs, transformations, similarity, trigonometry, circles, area, volume and probability. Each one starts with the key idea in plain words and a figure you can drag: move a point and watch the angles, lengths and areas change while the rule stays true. SEE IT IN 3D Boxes, prisms, pyramids and cones are real 3D figures: drag to turn them, pinch to zoom, drag a corner to resize. Tap "Lay the triangle flat" and the right triangle hidden inside the solid lifts out and lies flat, so the Pythagorean Theorem is right there. The new Diagonals in 3D topic covers box and cube diagonals, missing edges and distance in 3D. SEE WORKED EXAMPLES Swipe through fully worked examples, step by step, with the figure drawn to scale. PRACTICE WITHOUT LIMITS Every topic makes new problems as long as you want to keep going. Type your answer the way you'd write it (5√2, 12π, 3/8, 40°), get it checked instantly, and see every step of the solution. DRAW AND MEASURE The Sandbox is a blank page with points, lines, circles, polygons, angles, midpoints, perpendiculars and parallels — and everything is measured live. A TUTOR THAT SHOWS, NOT TELLS (optional) Type a problem or take a picture of a worksheet, and the tutor works it out on the figure: highlighting parts, drawing the construction, animating dilations and rotations, turning 3D solids and lifting their triangles out flat, and writing the math line by line. It speaks only in sentences from the app's own reviewed phrasebook, and the app checks its arithmetic. When it's done, practice more problems just like it. Share a lesson with a friend as a file they can open in GeometrAI. The tutor uses an AI service of your choice (xAI Grok, OpenAI or Anthropic Claude) with your own API key, added by a parent in Settings. Everything else works offline with no account. PRIVATE BY DESIGN No accounts, no ads, no tracking. Progress stays on your phone.